Database Develop

[Q] Charging on CM7 With A Non Nook Charger

Hey Guys,
So I've been using CM7 since Nightly 13 or so. Around that time I was using both my stock charger and other micro usb cables I had. I would plug the non-stock into a non-stock wall plug usb outlet thing or to the computer and I had no trouble charging the nook. This is great for being at work.
Then, somewhere around nightly 22 or so this stopped working. The icon in the status bar on the nook shows charging, spare parts reports "Charging USB" and "Charging AC" respectively, but the battery level only goes down.
To make matters worse, around nightly 22 I found that after I had used the non-stock charger even the stock stopped working. I was not getting ANY charge. I read somewhere that I could use CWM to clear the battery stats so I did and that appears to correct the problem. I'm able to use the stock again.
So here I am, running CM7 rc4 but I see that I'm still not able to charge from non-stock.
Does anybody know what gives here or can you point me towards more information?
Thanks

yeah, I seem to be having the same problem
My nook was out of juice this morning so I brought a usb cable with me to work
it's been plugged in for over an hour and it still won't even turn on..

mine charges fine with the cabble that came with my evo into my laptop

This sounds important enough to repost in the Developer forum, no?

actually, I think it is charging
it's just charging REALLY slowly
mine's finally booted up now

Well I understand it always has charged much slower without the standard Nook charger, so maybe this is just an isolated case for the OP?

If I don't turn off the screen and use 1100 mhz + performance governor and have live wallpaper running, it won't charge. I think it's because it's using more power than my USB can supply.
If I have it on interactive 300/1100, with the screen off, it will charge overnight.

I don't think its and isolated event, I have the same problem but with the original nook charger its all out of juice its been connected to the wall jack for 1 hour and its not even trying to turn on.
It's a very pretty paperweight telling me that I should try again in 15 minutes for the past hour.

Yours won't charge with the original charger? What kind of light are you getting on the charger cable? Have you tried turning the machine completely off?

chisleu said:
If I don't turn off the screen and use 1100 mhz + performance governor and have live wallpaper running, it won't charge. I think it's because it's using more power than my USB can supply.
If I have it on interactive 300/1100, with the screen off, it will charge overnight.
Click to expand...
Click to collapse
Yeah, after waiting the day it appears this is the case. I have to leave the screen off and it will charge. If I actually use it I think I'm consuming more power than trickles in. That's really lame.
I've had the screen off for the last 5 hours (using it occasionally) and it is now at 50% battery, up from 8%. So I guess it is charging... just REALLY slowly.
What, if anything, can be done about this? Is this a purely hardware issue or is there a software aspect to this. I'm telling you, I didn't have this issue with nightly 13 (or so).

You know, I had been using the "ondemand" governor but have changed over to the "interactive". I wonder if that has anything to do with it. I'm going to switch it back and see if it makes a difference.

Someone please correct me if I'm wrong but I believe the nook only charges with the nook charger.
When I plug CM7 into the PC the battery percentage will jump to 100% after some (brief) time. Since I know it's too short of a time to fully charge the battery I rebooted the Nook Color and it showed the proper battery percentage.
As an aside, you're not supposed to let lithium ion batteries fully discharge. It's bad for the battery.

No I understand that it does charge via regular USB, just more slowly. The Nook cable is specially designed to add additional pins for higher voltage charging. Or something like that.

I have this plugged into a standard Motorola microUSB wall charger and it works fine for my Nook Color.
The only thing is that it charges at a much lower amperage.
You can verify this with a quick dmesg piped to grep in a terminal:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
With the standard Nook Color Charger, it charges at a rate of 2A.
It works fine at 500 mA; it just takes a lot longer.
Does anyone know if charging this way might cause damage over time to the Nook?

Logically, if it were harmful they wouldn't allow you to use a USB cable to connect to a powered USB port on a PC. (Or they'd disable charging upon such a connection.)
I mean, some people are going to leave the things connected to their PC for long periods.

xdabr said:
Logically, if it were harmful they wouldn't allow you to use a USB cable to connect to a powered USB port on a PC. (Or they'd disable charging upon such a connection.)
I mean, some people are going to leave the things connected to their PC for long periods.
Click to expand...
Click to collapse
Well... for the record, the stock nook complains when you use the non-stock charger. And it doesn't report charging.
It definitely charges using CM7, but it is super slow AND using the nook while charged seems to break even on battery consumption. If I shut the screen off though it definitely puts power into the battery.
You can see all this by using SpareParts. It shows battery info on demand and you'll actually be able to see the voltage in the battery and watch it charge. Percentage be damned I'm looking at voltage
So... I think my original question is answered. Yes, it will charge off USB or non-stock charger using a non-stock cord. It charges slowly and with a low amount of voltage meaning I can't really use the thing if I expect it to charge.
Maybe I just need to man up and buy another stock charger. :/

Paul22000 said:
It works fine at 500 mA; it just takes a lot longer.
Does anyone know if charging this way might cause damage over time to the Nook?
Click to expand...
Click to collapse
Quite the opposite. For Li-Ion batteries, a slower "trickle" charge is actually recommended over the "quick" version via higher amps.

3rd party chargers aside, are you saying with stock Nook Eclair it doesn't "report" any charging when attached with a standard USB cables to a PC -- and does it in fact NOT charge at all that way? 'Cause that would be a signifier to me that it's not intended and is potentially unsafe.
I thought I had read that it does eventually charge, just as it does in CM7....

Mine will charge with the non-oem chargers, but it takes forever. I try not to let mine completely die because it's such a pain to get it powered on again. I get the notice on screen that says something about "continue charging and try again in 15 minutes" and it takes much longer than that. Last time it died all I had was a non-oem charger at my parents' place and I had to leave it plugged in over night and when I woke up it was back on but STILL not 100%. It's a pain when you're in a hurry, but if you're in a bind and that's all you have but have time to leave it, it will eventually power back on. At least that's my experience with the nook running cm7.

Definitely seems software/driver issue. For me, the Nookie Froyo SD build had great battery time, and would slow-charge from a normal USB cable plugged into laptop. I know this because 1. It would charge, and 2. If it was fast-charging as normal, and pulling too many milliamps from the laptop, it would have informed me the USB port draw was too great, and disabled it. I have a Y USB power splitter for external hard drive - I should test if it changes anything if I use it (I'll assume it won't as it wouldn't have the custom pins).
Now that I'm messing with CM7 (sd) builds, battery drain is horrible, so I often get that "15 minutes" screen and I've had cases where it won't charge from a regular USB cable. Haven't done a lot of testing with these much, as I didn't want to have to leave it plugged in constantly.

Wont start! :(

I got a Tab yesterday without any cables. There was a little amout of battery left so i Rooted it and bought the "Euro Tap Bootstrab", i tried it, boot CWM, took a backup and then i turn it off. No battery left.
I got a USB cable today. Plugged it in my pc and tab, but I honestly cant see if charging or not. Sometime comes a large battery icon, but when pressing button it goes black
Cant hard reset.
Please help

Prozel said:
I got a Tab yesterday without any cables. There was a little amout of battery left so i Rooted it and bought the "Euro Tap Bootstrab", i tried it, boot CWM, took a backup and then i turn it off. No battery left.
I got a USB cable today. Plugged it in my pc and tab, but I honestly cant see if charging or not. Sometime comes a large battery icon, but when pressing button it goes black
Cant hard reset.
Please help
Click to expand...
Click to collapse
A PC will charge it very slowly. You need to plug it into a wall charger. You probably didn't brick it. See if you can get a USB wall charger from somewhere. Usually Blackberry chargers have a USB port that you can plug the cable into.

Using my HTC usb charger, thanks! So I just have to wait now?

Prozel said:
Using my HTC usb charger, thanks! So I just have to wait now?
Click to expand...
Click to collapse
Yeah, pretty much. I don't think backing up your Tab would have bricked it, even if the battery died mid-backup since you're reading from memory (internal), not modifying it.

Ehm, to be precise, I pressed "Reboot System", a samsung logo popped out, I waited a long time and it didnt change so i turned it off. Dont hope it's bricked

Just what!? I've charged it for about an hour and have litterly tried everything, this suck big time! It just wont start

Prozel said:
Using my HTC usb charger, thanks! So I just have to wait now?
Click to expand...
Click to collapse
I've charged it for about an hour
Click to expand...
Click to collapse
Just plugging it in HTC charger gives you almost nothing! Original Samsung charger has a "trick" inside - it has pins 2 and 3 of its USB output connector shortened, and on top of that it has also 2 resistors between these pins and +5 and GND pins. When you plug the cable in common charger the tab does not "understand" that now it must take full power from the charger and does not charge the battery actually (it should take appr 1 A current from the original charger for 4 hours to be fully charged). You should get an original charger, or get a special adapter connected between your HTC charger and tab's cable (I have seen some at Amazon.de), or to make an adapter yourself.
PS. There is a strong recommendation: never do any programing, flashing, backup or restore with battery discharged below 80%, better to do it with charger connected.

Thanks, good to know, however the orginal is lost.. so can i still use the HTC but it will take longer or?

Prozel said:
Thanks, good to know, however the orginal is lost.. so can i still use the HTC but it will take longer or?
Click to expand...
Click to collapse
I am afraid the tab will "think" that there is no charger at all. Connecting it to USB port of PC may give a result after several hours (very-very slow charging). Why don't you think over getting (or making) an adapter?!

Will defo get one, but then I would have wait till monday
Don't think i can make one

Prozel said:
Don't think i can make one
Click to expand...
Click to collapse
Actually I have made this adapter in 20 minutes (but I am formerly an electronic engineer, though).
Well, then try to connect it to PC for the whole night (do not forget to keep PC running ), maybe it works out...
First try to run it, if it hangs, try CWM/restore, if it is bricked - re-flash it.
Good luck!

Thanks alot, really! Will report back tomorrow. Again tanks

Just to be clear, when it's charged, does the battery icon have to be there all the time? It does disappear after some while when it's connected

Battery icon disappears in several seconds when the tab is switched off. Short pressing on power on button shows it again for some while. Moving dots under icon show charging in progress.
When the tab is fully charged it makes a short sound.
When the tab "understands" that it is connected to a charger, it also makes a short sound.
PS. After recovering the unit I recommend to install Battery Watch from the Market - it has a widget and you will always know the state of battery etc. And you can see a graph showing a battery behavior. And this application is on top of that shouting - "Charging started!", "Charging complete!", which is funny...

Guess mine doesn't charge?
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

Sorry for delay - no, it does not charge... the reason was explained.

Yeah i see now. Thanks for taking you time. Defo appreciated

Just for reference, do NOT turn your GTab on while charging from a pc. It won't charge at all. Keep it turned off, and then wait for like 9 hours (it takes about 50 minutes to increase the charge to 10% from my laptop).
And when you flash, always have a full charge. ;-)
Sent from my GT-P1000 using Tapatalk

Hehe, yeah I just couldn't wait
Gonna pick up a HDMI dock tomorrow, until I've connected it to a laptop to see if it will charge.

So i got a proper charger, but does it charge?

Final fix for Nexus 4 red light of death

Hello i'll try to explain how i fixed the red notification light when my friend's phone died.
The situation was that he charged the phone from the car built in USB and after he unplugged the charger the phone never powered on.
I tried all the solutions that google search can provide and nothing helped.
The problem was that when you plug the charger the red light stays on without any blinks and nothing helped.
Tools you need:
*Torque screw T5 screwdriver
*Small Philips screwdriver (thanks scream4cheese for remind)
*Plastic handle or something else (to open the back cover without damage it)
*Thin wires
*old/new phone charger
So lets start - hope it will help some one that stuck in this situation
1. First of all you need to remove the back cover to get access to the battery.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
2. Unscrew the 2 screws that holds the battery flex cable.
3. Disconnect the flex cable from the phone.
4. Now you need two thin wires that you can connect to the battery flex cable.
5. Find some old phone charger ( i used old nokia charger ) that can provide about 5.0v-5.8v.
6. If you have volt meter find where is the positive and negative (+) and (-).
7. Connect the battery positive (+) to charger positive (+) and negative to negative.
8. Plug the charger to power and wait about 15-13 minutes, do not leave in that charging position too much time because the battery may EXPLODE.
9. Disconnect all the wires and reconnect the battery to the phone (if not working wait few minutes and start over from step 7) maybe the connections is not good or mot enough charged.
10. power on the phone and you have solved that issue.

This is really helpful. It should be a sticky. :thumbup::thumbup:
Also I would like you to add the type of screw drivers is needed to open the phone's cover and the pins.
Torque screw T5 screwdriver
Small Philips screwdriver
Sent from my Nexus 4 using Tapatalk 2

Good to know in case it happens so thanks but I was just wondering whether just disconnecting battery terminals wasn't enough as quite a few mentioned that that's how they fixed it so not sure how this method works.
Anyway thanks
Sent from my Nexus 4 using xda app-developers app

It looks to me that there are circumstances where battery drain is such that the battery voltage drops too far too fast for the phone's charging circuits to cope. (Hence it happening mostly to people running battery-sapping benchmarks.)

gie62001 said:
Good to know in case it happens so thanks but I was just wondering whether just disconnecting battery terminals wasn't enough as quite a few mentioned that that's how they fixed it so not sure how this method works.
Anyway thanks
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
As i mentioned the battery discharged fully under the 0.2 Volt (after charging the phone with incompatible charger which output is about 3.5V) *in this case the battery is much powerful than charger and it forwarding the power back to charger and not the charger to phone*
so the phone doesn't know that the battery is OK and thinks that it is bad battery, in this case you should use my method or replace to new one if you have an choice to receive it fast or find in local shop.
I'm not guarantee that my method will save your battery you may need to replace it.

According to the service manual, the wireless charger is also separate from the other phone circuitry.
The red light indicated trickle charging, which is slow. And maybe the phone uses more charging than even trickle charging can provide.
A Qi charger should charge the battery normally even if it is empty, as the phone does not need to power up to achieve high charge currrent.
That sounds a lot easier than opening it up and charging the battery manually!

jutezak said:
According to the service manual, the wireless charger is also separate from the other phone circuitry.
The red light indicated trickle charging, which is slow. And maybe the phone uses more charging than even trickle charging can provide.
A Qi charger should charge the battery normally even if it is empty, as the phone does not need to power up to achieve high charge currrent.
That sounds a lot easier than opening it up and charging the battery manually!
Click to expand...
Click to collapse
In this case the Qi or Original nexus charger not helping, because it connect to the same circuit as usb charger, the mother board controls the battery charging so in this case you cannot charge in any way if the phone thinks that the battery is bad.
Any way in most cases like that you will change to new battery because the old one is totally dead :/

Neat. So you basically used a defibrillator on the battery . Sad to see the battery management being so poor on this device that it lets the battery drop that low.
Sent from my Nexus 4 using xda premium

Ummmmm. I think people are just being impatient. I had my N4 powered off while overseas for 2 months. When I returned and turned my N4 on, I received the "Red Light of Death".
I read through all of the forums and found the same fixes everywhere.
Open the phone up and reset the battery terminal bar, etc etc...
Now, I have no problem doing that, but I just couldn't accept such a major flaw from this phone, not to mention the problem appeared to be widespread.
Anyways, back to my original point, people are just crazy impatient and freak out over each and every little thing. The first thing they do is rip their phone open and start tinkering.
I ASSURE YOU. JUST LEAVE IT PLUGGED IN USING THE WALL CHARGER FOR AN HOUR OR SO, and it WILL turn back on.
Now, maybe there are situations out there where my method doesn't work, in that case, shame on LG and Google.
Though, I would be willing to bet, if this happens to anyone else, just leave it the hell alone and let it sit on the wall charger for a couple of hours, turning it on and off a few times in between (or at least attempting to), it will come back to life.

It took a month to get my phone...When i got it finally..it had no charge at all..tried to switch it on but all i got was a red flashing led.it scared me a lot but i plugged in the charger and it stayed there for an hour until it turned on..
Sent from my Nexus 4 using Tapatalk 2

There is a lot of cases for the red button, in my case nothing helped only that solution, I'm not telling people to use my advice when you see red light first of all should try easier way to solve it, like charge with original charger for few hours etc
Sent from my Nexus 4 using xda premium

Hi
This is defeating a safety mechanism. When lithium batteries are over discharged they can become permanently damaged and then are not safe to recharge. Recharging could result in gassing and or an explosion and fire, this may not happen right away or at all, however the chances of this happening is significantly increased after a deep discharge or some other fault causing over-heating etc. Why did LG build in this protection mechanism in the first place? Do people just think it was to annoy owners and have returns for no reason? Lithium batteries can be lethal which is why there have been world wide recalls in some cases, and they are only safe now because of safety devices built into the battery and phone.
I wouldn't want a phone exploding in my pocket or against my face or in my hand or setting fire to my home. Lithium batteries are generally pretty safe only because of these safety mechanisms, defeat them and lithium batteries become pretty dangerous.
Read up on safety issues here: http://batteryuniversity.com/learn/article/lithium_ion_safety_concerns especially under the "What every battery user should know" section and please realise you are literally playing with fire by defecting or shorting out the safety mechanism which this direct charging method is likely doing.
Regards
Phil

Very good thank you

Must say this has saved me from the trouble that would be sending my phone to RMA! Thanks a lot!

This worked for my girlfriends Nexus 4 that she allowed to go completely dead. 3 buttons, etc...would not get a response from the unit.
yev.gavrikov said:
Hello i'll try to explain how i fixed the red notification light when my friend's phone died.
The situation was that he charged the phone from the car built in USB and after he unplugged the charger the phone never powered on.
I tried all the solutions that google search can provide and nothing helped.
The problem was that when you plug the charger the red light stays on without any blinks and nothing helped.
Tools you need:
*Torque screw T5 screwdriver
*Small Philips screwdriver (thanks scream4cheese for remind)
*Plastic handle or something else (to open the back cover without damage it)
*Thin wires
*old/new phone charger
So lets start - hope it will help some one that stuck in this situation
1. First of all you need to remove the back cover to get access to the battery.
2. Unscrew the 2 screws that holds the battery flex cable.
3. Disconnect the flex cable from the phone.
4. Now you need two thin wires that you can connect to the battery flex cable.
5. Find some old phone charger ( i used old nokia charger ) that can provide about 5.0v-5.8v.
6. If you have volt meter find where is the positive and negative (+) and (-).
7. Connect the battery positive (+) to charger positive (+) and negative to negative.
8. Plug the charger to power and wait about 15-13 minutes, do not leave in that charging position too much time because the battery may EXPLODE.
9. Disconnect all the wires and reconnect the battery to the phone (if not working wait few minutes and start over from step 7) maybe the connections is not good or mot enough charged.
10. power on the phone and you have solved that issue.
Click to expand...
Click to collapse

works like a charm, just fixed mine by following the steps.
I dropped my phone in the pond and it was totally submerged under water for about 3-4 minutes, can't power up after, dry for couple of days still doesn't work, all I got was a red led light while charging (not flashing).
I thought the phone was beyond repair so just leave it in a bag of rice to see if there's any miracle. Take the phone out after 3 days, connect to the charger and I get a red flashing light, I think it is a good sign, so I did a google search and redirected to this post, connect the battery flex to an old nokia charger for about 14 minutes and it was fixed, how amazing is that.
My sincere thanks to yev.gavrikov!
-----------------------------------------------------------
update:
the phone turns off automatically after 20 minutes, the red flashing light comes back, will try again tmr, too late to go through that again.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
before I connected the wire with the battery flex I took a read with a volt meter the voltage is 0.36, after a 14-minutes charge the voltage increased to 1.30, still way below the 3.8v standard voltage. But the phone is ok to power up with the stock charger and the battery status bar shows 99% after charge for about half hour. I thought it was fixed, though the the charging rate seems little bit too high, from 1.3v to 99% just within half hour !
Will try again tonight, but I figure might be something wrong with the power management module of the main board.

Don2k9 said:
works like a charm, just fixed mine by following the steps.
I dropped my phone in the pond and it was totally submerged under water for about 3-4 minutes, can't power up after, dry for couple of days still doesn't work, all I got was a red led light while charging (not flashing).
I thought the phone was beyond repair so just leave it in a bag of rice to see if there's any miracle. Take the phone out after 3 days, connect to the charger and I get a red flashing light, I think it is a good sign, so I did a google search and redirected to this post, connect the battery flex to an old nokia charger for about 14 minutes and it was fixed, how amazing is that.
My sincere thanks to yev.gavrikov!
-----------------------------------------------------------
update:
the phone turns off automatically after 20 minutes, the red flashing light comes back, will try again tmr, to. o late to go through that again.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
before I connected the wire with the battery flex I took a read with a volt meter the voltage is 0.36, after a 14-minutes charge the voltage increased to 1.30, still way below the 3.8v standard voltage. But the phone is ok to power up with the stock charger and the battery status bar shows 99% after charge for about half hour. I thought it was fixed, though the the charging rate seems little bit too high, from 1.3v to 99% just within half hour !
Will try again tonight, but I figure might be something wrong with the power management module of the main board.
Click to expand...
Click to collapse
I went in the pool with my Nexus 4 in a plastic bag to keep the sand out. Realized it after several minutes that I still had it in my pocket and got it out. Didn't have any rice so I wrapped it in a diaper for a day. Then I got some rice and left it in the rice for about 2 days. I pulled it out and it looked dry enough. Plugged it in and got the battery charging white icons. They went away, I waited a few minutes and tired to turn it on. Nothing. So I waited a while longer and tried it again. The red light started blinking and I couldn't get it to do anything. I tried different cords but no help. When I tried to plug it into another charger base I noticed some condensation in the front camera and in the back flash. So I stopped the whole deal and put it back in rice and laid it up in a window sill. I'm not sure what my next move is. I think the flashing red light might have saved me from turning it on and screwing it up further. I've rooted my previous phones and I feel fairly comfortable with that stuff but I'm a little nervous taking the back off this phone though. I would finally like to try a wireless charger first before I go ripping into the back of this thing. Plus I don't have a volt meter to check the charger. Any suggestions on how I could try a charger without buying one? Or what my next step is?

QI chargrer
Hey there I actually was looking for a soluiton to this, since i HAD the same problem. I didnt wanted to open up my phone, so i decided to charge it back somehow else. With the normal factory charger wasnt really successfull try, so i bought a QI charger, with USB pluggable slot at the end, and plugged to the factory 1.2a converter. After 1-2 hours my phone started to charge, and displayed the charging white battery instead of blinking light!
So im actually really thankfull on all the ideas here, hope my suggestion will help on more ppl.

A little over a week ago I was driving to a client in a very rural area. Had my Nexus 4 running Navigation and playing music over my car's AUX port. Also had my USB plugged into the car's cigarette lighter port to keep it charged.
All of a sudden, the music stopped playing. Looked at the phone and it was off. Pushed the power button to turn it back on and the red LED started blinking. At this point I panicked because it was a 4 hour drive in the middle of nowhere, had no idea where I was going, and now no Nav or phone calls.
Over the next 10 minutes I kept pushing power and holding it for a variable length of time, from just an instant to 30 seconds or more. No dice. Then after what must have been the 20th try or so, the phone booted up. Relief! When it was fully booted, I noticed the battery was around 90%. No problems since then.
FWIW, YMMV.

Nexus 4 Red light of death FIXED
@yev.gavrikov
Thanks a TON Friend :highfive:
Finally My Bros. Nexus4 Worked we just did till Step 3 and again installed it Back
Amazingly phone booted back to basic
The Story:
Device Info Nexus 4
Kernel : Franco nightly R156
ROM: PA 3.6
 @Stock Speed Stock CPU Governor
was running AnTuTu Benchmarking the battery was @50% suddenly in between the test phone screen was off, when we checked phone was not booting up :crying:
So i saw this Thread and watch 2-3 videos How to dismantle the Nexus 4
Skills : Moderate (Needs Precision and patience)
I just removed and reinstalled the battery terminal.
And amazingly the phone Started ....WOW Awesome :good: @yev.gavrikov
Thanks

[Big problem] [Death Xperia V]

Hi guys
I have got problem my xperia v death after power off.It dosent turn on and when i plug into charger no led no charging. Nothing, rom CM 10.2 stable, It happen when i format sd crd and turn off phone in cwm after that phone dont turn on
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Ok i removed battery and plug phone in usb now red led diode blink for 4sec but when i plug it which battery. Nothing

Was the phones charge less than 20 % at the time when you did the operation?

Use like a rubber band or something to tie down the power button and plug in charger. Should be able to charge up. Give it some charge and try to flash stock again.

peter-k said:
Was the phones charge less than 20 % at the time when you did the operation?
Click to expand...
Click to collapse
USB charging mayby 30-50 % i dont remeber

How much time i must charg it beacouse when i try to charge this option ( i sit there 5 min) nothing like normal no led no charging animation

I thought I noticed when my phone has a low charge state, it does not want me to do things like restoring, updating core apps, or other significant changes to the system.
Charge it at least over night regardless what the charge indicator says.

peter-k said:
I thought I noticed when my phone has a low charge state, it does not want me to do things like restoring, updating core apps, or other significant changes to the system.
Charge it at least over night regardless what the charge indicator says.
Click to expand...
Click to collapse
Hi the problem is its say nothing no led no animation do not know phone charges

Guys is better i pull out battery then plug in charger wall than i put battery back and wait now red diode blink red always without stopping but phone dosent turn on
PS I gave him a charge later on but the LED does not light up but after 2 minutes she started to flicker about 6 times red then again shone red, and so all the time

Hi everyone,
I currently experience exactly the same problem. I wanted to flash my CM10.2 to the last night build (CM11) on my Xperia V. I boot into recovery mode and wipe data / factory reset and wipe some data from sdcard. I finally choose the "Restart system" option. The phone turns off but never restarted. I think I wiped some important files from system or kernet. I tried all combinations of keys (vol- + power, vol+ + power, only vol- while plugin in usb etc) but nothing occured. No LED, no vibration, no screen on. My phone was charged around 65% when I started operations.
I tried to charge my phone via the wall plug. No led. I wait during more than 30 minutes but nothing changed (I was expecting the back of the phone a little bit warm as it usually the case when charging).
As Ghost4Fun, I noticed that if I pull out the battery and plug the device with wall charger and then put the battery back, the red led blink red 2-3 times but finally turn off. If I pull out the battery, plug the device on usb and hold vol- + power during few seconds, the red led blink. It continues to blink even after release keys. If I put the battery back, the red led stay lit during 1-2 seconds before turning off.
This xperia v is not the first android device I change rom and it's not even the first time I flash this phone. I already experienced some problem during flashing with infinite reboot, device stucked on boot animation, etc but this time it's quite different as nothing happen with keys. Hope it's not bricked and someone could help us.

OK no help close thread... i will send to services f****** SONY

Ghost4Fun said:
OK no help close thread... i will send to services f****** SONY
Click to expand...
Click to collapse
Only what i discovered is i when the red led coming in charging than if u press volum + and power for half minut than u get constant led red it is normal?

Ghost4Fun said:
Only what i discovered is i when the red led coming in charging than if u press volum + and power for half minut than u get constant led red it is normal?
Click to expand...
Click to collapse
Hmm this is good. If you press the power button now do you see red light? if you see that try holding power button and then put it on the charger! Worked once for my Xperia T

hhamzah49 said:
Hmm this is good. If you press the power button now do you see red light? if you see that try holding power button and then put it on the charger! Worked once for my Xperia T
Click to expand...
Click to collapse
dm led red switch off than i try to connect to my pc but nothing. No now it isnt red led when pressing power button

I aslo tried quite a lot of configurations with keys and power source (wall or usb) but the only thing changing is the led frequency (~30s, ~45s, ~1m). I leave the phone charging during the entire night and some hours today but it didn't change anything. I aslo tried to let it charge with some keys pressed by an elastic (I read the problem can be related to a flat battery). I haven't been able to have another color than red from the moment it turned off the last time.
I don't think the issue is from the battery as it was 65% charged when it died and even if the phone is plugged for hours, the led color doesn't change and the heat is ambient. The problem is that if it's not related to the battery, it must be software and the only way to fix it, is to make the phone recognized by the PC.
I also plan to send back the phone to Sony but as I'm not at home for the next week, I have 7 days to try to fix it myself :victory: Does anyone already send back a phone to Sony in this state? I mean, my phone is (was ) unlocked, rooted and with a custom rom, I'm really not sure they will fix it (I'm sure they can but not sure they want). Maybe the data I wiped and make the phone bricked will also hide it to them :fingers-crossed:

piu65 said:
I aslo tried quite a lot of configurations with keys and power source (wall or usb) but the only thing changing is the led frequency (~30s, ~45s, ~1m). I leave the phone charging during the entire night and some hours today but it didn't change anything. I aslo tried to let it charge with some keys pressed by an elastic (I read the problem can be related to a flat battery). I haven't been able to have another color than red from the moment it turned off the last time.
I don't think the issue is from the battery as it was 65% charged when it died and even if the phone is plugged for hours, the led color doesn't change and the heat is ambient. The problem is that if it's not related to the battery, it must be software and the only way to fix it, is to make the phone recognized by the PC.
I also plan to send back the phone to Sony but as I'm not at home for the next week, I have 7 days to try to fix it myself :victory: Does anyone already send back a phone to Sony in this state? I mean, my phone is (was ) unlocked, rooted and with a custom rom, I'm really not sure they will fix it (I'm sure they can but not sure they want). Maybe the data I wiped and make the phone bricked will also hide it to them :fingers-crossed:
Click to expand...
Click to collapse
http://talk.sonymobile.com/t5/Xperia-Ion/Xperia-ion-hard-bricked/td-p/310905
i will try at week but if it wont help i send it to sony i too had custom rom

Thanks for your link (there is a limit of 10 messages before a member can post external link so I can't quote you ).
I tried to plug my device to the pc with the rubber on the volum - button during 15 minutes without any chance to make it recognized by the flashmode. I will plug it to the wall charger for the entire night and will wait. I never thought a battery can be as long to charge. If someone has the technical reason of this long charge when a device is bricked, I'm interested by the answer.
I will update you as soon as I have news.

@Ghost4Fun i think it is because of the broken boot.img inside the ROM, use FLASHTOOL, put the devices in fastboot mode then flash a kernel, maybe NK Kernel, it has recovery http://forum.xda-developers.com/showthread.php?t=2223534

tuzmaster_v2 said:
@Ghost4Fun i think it is because of the broken boot.img inside the ROM, use FLASHTOOL, put the devices in fastboot mode then flash a kernel, maybe NK Kernel, it has recovery http://forum.xda-developers.com/showthread.php?t=2223534
Click to expand...
Click to collapse
if i could enter fastboot mode

Sony technicians are arrogant dim wittes fools. I just came from sony and xplain my problm.
The technician said i have a problem with the phones board but he was using the device whem he was navigating it.

Dead battery bootloop

This morning my Teclast X98 battery was down to 5% in Android. I shut down the tablet and connected it to a charger. The moment I connected the tablet to the charger the tablet started to boot. It showed a red charging battery overlay and shut itself down again immediately. The tablet ended up in a bootloop from which there is no escape.
I've had this same problem once before. A couple of weeks ago I somehow managed to get the Tablet into BIOS settings, boot into Windows and perform a shutdown from there. When I shut down from Windows the tablet wil stay off when I connect a charger.
No such luck this time. After 50 or so reboots, with me trying to get into the BIOS settings, the pattern changed. Instead of showing the red battery overlay, the tablet would show warning messages that it could not display the red battery overlay:
ConvertBmpToGopBltofBATMonitor failure
GraphicsOutput -> Blt failure...
One thing that complicates this is that my tablet will not charge anymore when powered on. It only charges when powered off. So it now toggles between: Powered off and charging / Powered on and not charging. It's a known problem when you've used a USB OTG charging hub. Read the comment section on that YouTube video. That guy has tried everything (and so did I).
What options do I have right now?
Leave the tablet in this bootloop, hoping that it will eventually stop booting and start charging
Contact the seller, report the problem and ask for a solution
Take the BIOS chip out and try to charge the tablet without BIOS chip

I managed to get out of this boot loop.
I opened the tablet and unsoldered pin 1 of the EPROM. This prevented the tablet from booting, but it would still charge. I charged it for a couple of hours, soldered pin 1 of the EPROM back and I am now using the X98 again.
If anyone needs some more information, I will search for pictures and write a tutorial.
I still have this problem where the tablet starts automatically as soon as I connect a charger. This only happens if I power off in Android. If I reboot to Windows first and then power off everything is fine. If anyone knows a solution to this problem I can prevent this from ever happening again.

.oOOo. said:
I managed to get out of this boot loop.
I opened the tablet and unsoldered pin 1 of the EPROM. This prevented the tablet from booting, but it would still charge. I charged it for a couple of hours, soldered pin 1 of the EPROM back and I am now using the X98 again.
If anyone needs some more information, I will search for pictures and write a tutorial.
I still have this problem where the tablet starts automatically as soon as I connect a charger. This only happens if I power off in Android. If I reboot to Windows first and then power off everything is fine. If anyone knows a solution to this problem I can prevent this from ever happening again.
Click to expand...
Click to collapse
Hi. Got this problem since last week and I'm really upset, since I've searched a lot and found no solution at all. I've resoldered white and red battery wires but no success... Could you help me with this tutorial about EPROM?
And do you still get these messages when charging if last boot was from Android? Or these characters are gone? Thanks for any kind of help!

rafabrasil85 said:
Hi. Got this problem since last week and I'm really upset, since I've searched a lot and found no solution at all. I've resoldered white and red battery wires but no success... Could you help me with this tutorial about EPROM?
And do you still get these messages when charging if last boot was from Android? Or these characters are gone? Thanks for any kind of help!
Click to expand...
Click to collapse
Yeah, doing the thing with the battery wires did not work for me as well.
If you want to charge your tablet only once, you can use this trick I used:
Open up the tablet
Find the BIOS-chip
Remove the metal heat sink around the chip (it comes off easy)
Now unsolder pin 1. Heat the pin until the solder melts and then push the pin loose with a very small screwdriver
Now charge the tablet. The battery will probably get warm (not hot), and so might some of the chips. The heat will get less when the tablet has been charging for a couple of hours
Solder pin 1 back again
This is the location of the BIOS chip. It is the chip at the bottom of the picture below.
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In the picture below the heat sink has been removed. Pin 1 is indicated with a grey dot on the bottom right corner of the BIOS chip.
Another solution, if your tablet does not charge at all when powered on. I did manage to get my tablet charging again with a custom USB cable. This is the video from 1KeNnY1KeNnY1 descibing the solution:
I bought these USB connectors from China on eBay (adafruit sells one too) and these resitors also from eBay. If you need the components fast I'm sure you can find them in a local electronics shop.
You will also need a very stable hand and a lot of patience to solder the USB connector. Make sure you get a few of them because you will probably ruin the first one.
Then:
Find a USB cable that charges with a decent charge. Make sure the wire is not too thick for the new USB connector.
Cut off the mico-usb connector and strip the wires
Solder the red wire to pin 1, and the black wire to pin 5
Solder the 2.2 kOhm resistor between pin 1 and pin 4
Do not connect the green and the white wire. If you do, Windows will think you connected a malfunctioning device when you use the custom cable.
Here's an image showing which colour goes where.
And this image shows you all the pin numbers:

Wow! Great tutorial, man. Thanks a lot!! Wish more people have your kind spirit and help others with less knowledge.
If I understood it right, first option gives me one full charge but I will have to open tablet again when battery is empty, and the bootloop error isn't gone. The second will let me charge it normally but only using the new modified cable and the anoying error is gone forever... Is that right?
I will try these methods asap this week and reply to you.
Many thanks!
Have a nice day.

rafabrasil85 said:
Wow! Great tutorial, man. Thanks a lot!! Wish more people have your kind spirit and help others with less knowledge.
If I understood it right, first option gives me one full charge but I will have to open tablet again when battery is empty, and the bootloop error isn't gone. The second will let me charge it normally but only using the new modified cable and the anoying error is gone forever... Is that right?
I will try these methods asap this week and reply to you.
Many thanks!
Have a nice day.
Click to expand...
Click to collapse
You can still charge the tablet when it is off, and it won't charge when the tablet is on, right? I've searched through your posts but gave up after a couple of them. So I'm not really sure if your problem is exactly the same as mine. Could you copy-paste your initial problem report here in this thread?
I'm using Windows on my Teclast x98 so I used to hibernate my tablet automatically after 30 minutes of inactivity. When the tablet is off, it will start charging. And because the power off was triggered in Windows, the tablet will not boot automatically when the charging starts.
If you use Android, you're out of luck. You will have to boot into Windows and then shutdown the tablet from there to get it to charge. That's a major hassle. And if you forget it once and Android keeps running until the battery is too low, you will end up with the same problem you have now.
The custom cable is the best solution if your tablet does not charge when powered on. Other solutions will kill you tablet pretty fast. Doing too many hibernations will ruin the SSD. Desoldering the BIOS chip will also fail after 10 times or so. In both cases the tablet is ruined.

.oOOo. said:
You can still charge the tablet when it is off, and it won't charge when the tablet is on, right? I've searched through your posts but gave up after a couple of them. So I'm not really sure if your problem is exactly the same as mine. Could you copy-paste your initial problem report here in this thread?
I'm using Windows on my Teclast x98 so I used to hibernate my tablet automatically after 30 minutes of inactivity. When the tablet is off, it will start charging. And because the power off was triggered in Windows, the tablet will not boot automatically when the charging starts.
If you use Android, you're out of luck. You will have to boot into Windows and then shutdown the tablet from there to get it to charge. That's a major hassle. And if you forget it once and Android keeps running until the battery is too low, you will end up with the same problem you have now.
The custom cable is the best solution if your tablet does not charge when powered on. Other solutions will kill you tablet pretty fast. Doing too many hibernations will ruin the SSD. Desoldering the BIOS chip will also fail after 10 times or so. In both cases the tablet is ruined.
Click to expand...
Click to collapse
Thanks again for your help!!
No, I can't charge because when I plug it to energy, this bootloop starts and battery seems not to charge at all! When it enters in this bootloop state, pressing the power button does nothing. Pressing it for 10 seconds does nothing. Pressing power plus volume does nothing too. When I unpplug tablet from power, I get no response from it, just a black screen.
Before this happens, charging was working ok, I could charge it from both OS and didn't matter if it was on or completely shutted down. One day I was using it (don't remember in which system) and battery started to deplete itself from nowhere, so I plugged the original charger with original cable, as always. But they stopped working, battery discharged and then it was gone...
Ok, thanks for your patience and all information. I will try modding the cable, then I post here the results.
Have a nice day.

rafabrasil85 said:
Thanks again for your help!!
No, I can't charge because when I plug it to energy, this bootloop starts and battery seems not to charge at all! When it enters in this bootloop state, pressing the power button does nothing. Pressing it for 10 seconds does nothing. Pressing power plus volume does nothing too. When I unpplug tablet from power, I get no response from it, just a black screen.
Before this happens, charging was working ok, I could charge it from both OS and didn't matter if it was on or completely shutted down. One day I was using it (don't remember in which system) and battery started to deplete itself from nowhere, so I plugged the original charger with original cable, as always. But they stopped working, battery discharged and then it was gone...
Ok, thanks for your patience and all information. I will try modding the cable, then I post here the results.
Have a nice day.
Click to expand...
Click to collapse
That sounds a lot like my problem.
I do not think the custom cable will get you out of this situation. My cable doesn't provide a lot of power (about 0.6A or 3W). When I use the tablet with the cable connected, the battery still drains slowly. So the cable does not provide enough power for the tablet to run. Booting the tablet uses even more power.
I think you will have to jump start your tablet and charge the battery once like I did. After that you can use the cable to prevent the tablet from losing all its power again. This works for me in Windows where I can put the tablet to sleep. During sleep it will charge slowly. I haven't tried Android yet. I will do some tests in the next couple of days.

.oOOo. said:
That sounds a lot like my problem.
I do not think the custom cable will get you out of this situation. My cable doesn't provide a lot of power (about 0.6A or 3W). When I use the tablet with the cable connected, the battery still drains slowly. So the cable does not provide enough power for the tablet to run. Booting the tablet uses even more power.
I think you will have to jump start your tablet and charge the battery once like I did. After that you can use the cable to prevent the tablet from losing all its power again. This works for me in Windows where I can put the tablet to sleep. During sleep it will charge slowly. I haven't tried Android yet. I will do some tests in the next couple of days.
Click to expand...
Click to collapse
Nice! I'm waiting for your tests then. By the way, what do you mean with jump start?

rafabrasil85 said:
Nice! I'm waiting for your tests then. By the way, what do you mean with jump start?
Click to expand...
Click to collapse
I've done some tests today:
If the tablet boots it uses more power and the battery discharges, even with the custom USB cable connected
Charging under Android is very slow (approximately 10% / hour) if you are just browsing some websites. If you run a game or set the brightness of the screen higher I'm sure the battery will discharge
It is possible to power off the tablet from Android with the custom USB cable connected
The tablet needs more power then the USB cable supplies while booting. So you will not be able to revive your dead tablet with the USB cable alone. You will need to do the trick with desoldering pin 1 of the BIOS chip. I called that "jump start" in my previous post, but the comparison to jump starting a car is totally not obvious or correct.

.oOOo. said:
I've done some tests today:
If the tablet boots it uses more power and the battery discharges, even with the custom USB cable connected
Charging under Android is very slow (approximately 10% / hour) if you are just browsing some websites. If you run a game or set the brightness of the screen higher I'm sure the battery will discharge
It is possible to power off the tablet from Android with the custom USB cable connected
The tablet needs more power then the USB cable supplies while booting. So you will not be able to revive your dead tablet with the USB cable alone. You will need to do the trick with desoldering pin 1 of the BIOS chip. I called that "jump start" in my previous post, but the comparison to jump starting a car is totally not obvious or correct.
Click to expand...
Click to collapse
Now I got it! Lol
What a pain to have bought this tablet. I thought it was a great choice, but one year later I'm dealing with BIOS and battery wires and modded USB cables.
Thanks for all the good info. You are great!

X98 Saga
.oOOo. said:
I've done some tests today:
If the tablet boots it uses more power and the battery discharges, even with the custom USB cable connected
Charging under Android is very slow (approximately 10% / hour) if you are just browsing some websites. If you run a game or set the brightness of the screen higher I'm sure the battery will discharge
It is possible to power off the tablet from Android with the custom USB cable connected
The tablet needs more power then the USB cable supplies while booting. So you will not be able to revive your dead tablet with the USB cable alone. You will need to do the trick with desoldering pin 1 of the BIOS chip. I called that "jump start" in my previous post, but the comparison to jump starting a car is totally not obvious or correct.
Click to expand...
Click to collapse
Friend,
Sorry for the long delay, but I had other problems with this tablet (the flex power cable broke) and for a long moment I gave up using it.
So here is the situation: I've fixed the charger and the other problems, and now I can turn it on but there are no OS anymore, it goes directly to a shell. I can access the UEFI settings and tried installing Windows via pen drive, but when it gets to the screen which allows me to choose the drive to install, it is empty. System is not recognizing eMMC anymore... Do you have any hint on this?
I think it's been a year or more since I use this device for the las time, and it will be great to get it back working.
Thanks for your time again! =)

rafabrasil85 said:
Friend,
Sorry for the long delay, but I had other problems with this tablet (the flex power cable broke) and for a long moment I gave up using it.
So here is the situation: I've fixed the charger and the other problems, and now I can turn it on but there are no OS anymore, it goes directly to a shell. I can access the UEFI settings and tried installing Windows via pen drive, but when it gets to the screen which allows me to choose the drive to install, it is empty. System is not recognizing eMMC anymore... Do you have any hint on this?
I think it's been a year or more since I use this device for the las time, and it will be great to get it back working.
Thanks for your time again! =)
Click to expand...
Click to collapse
hi, can I ask how did you solve your charging problem?. I have similar situation like yours, my tablet wouldn't hold the charge and it boot loops to shell prompt when connected to power source. I was not able to do the windows installation because once I remove from the power source, the tablet wouldn't bootup.

sunshine76 said:
hi, can I ask how did you solve your charging problem?. I have similar situation like yours, my tablet wouldn't hold the charge and it boot loops to shell prompt when connected to power source. I was not able to do the windows installation because once I remove from the power source, the tablet wouldn't bootup.
Click to expand...
Click to collapse
First you build a custom charging cable with the instructions on this thread. Then you connect a UEFI Windows installation (prepared by Rufus) via pen drive. Make sure you have a HUB to also connect mouse and keyboard. In all my trials so far I ended only being able to boot RemixOS and ChromeOS via live boot with pen drives, but they miss touch input and some drivers. I'm still trying to reinstall Android directly to eMMC, but I don't have much hope left that it will work... I guess this memory is gone with this error.