Coolpad Sky 3 E502 (Modena 2) unbrick - Device Repair

Since there seem to be no information about getting the phone unbricked, here is how to do it.
It will work even if phone doesn't get detected by SP flashtool anymore by triggering emergency brom download mode by shorting KCOL0 pin (this is present only on Mediatek SoC's).
As per MT6735P SoC documentation the logical value is 1 for the pin KCOL0. To find the pin on unknown boards, the voltage should be around 1.76-1.82v.
Please use at least 200 ohm resistor when poking around with unknown pins.
1) Remove battery of your sky 3 device and unplug it.
2) Turn on SP Flashtool to flash only preloader with a known working one and press start on the tool.
3) Short KCOL0 and ground (can be chip shielding or big copper area near scew locations).
4) Plug device to your computer. Flashing procedure should start. Stop shorting KCOL0.

The board I am working with has around 15 different test points that read 1.8V. Do you have any suggestions for finding KCOL0 in a case like this? What are the signs to look for? Lastly, why 200 Ohms over something else? Was that a ballpark estimate? I've been using a 100 Ohm with no luck on my board to try out the various 1.8V pins. It is an Amazon Fire HD 8 7th gen, SX034QT

Related

[Q] Droid 3 bricked wont charge

So i bricked my droid 3, cant get it to charge, it just boot loops. It wont charge in recovery mode either. Is there any solutions to this, i cant get into clockworkmod recovery of course otherwise this would not be a problem. If anyone could help i'd b so happy. Until then i will be cutting myself with a rusty butter knife in solitude.
What were you doing when you bricked it?
i must have flashed a bad steeldroid 3 rom now just bootloops
I cannot use rsd because my battery is dead, and will not charge.
Well, then you kinda gotta either buy another battery and pray it has a decent charge or a TBH factory cable.
Sent from my DROID3 using xda premium
Similar problem
I tried to root my phone but it froze during the root stage (using Pete's root tools v1.06). Now its bricked.
Background:
D3, recently upgraded OTA to 5.6.890
Tried resetting by holding power button and x- doesn't turn on at all.
Any suggestions? I'm going to try this recovery: http://forum.xda-developers.com/showthread.php?t=1255198
thanks for the help, this is what i feared. I guess i was just hoping for some fantastic alternative. I read somewhere that a verizon store could charge my battery, not sure though. What is this TBH factory cable you speek of. Any idea where to get one.
well i read into it, and ordered a TBH factory cable, it was a good bit cheaper than another battery. Thanks to anyone who even took the time to glance at this post. I will post again if and how i get this beautiful brick functioning again. Looks like the cable is the ticket though
dannyblast said:
well i read into it, and ordered a TBH factory cable, it was a good bit cheaper than another battery. Thanks to anyone who even took the time to glance at this post. I will post again if and how i get this beautiful brick functioning again. Looks like the cable is the ticket though
Click to expand...
Click to collapse
Why not get a battery dock like this one?
http://i.ebayimg.com/t/Battery-Dock-Charger-Motorola-Atrix-4G-Droid-X-BH5X-/00/$(KGrHqEOKjUE3B,zI6T8BN1pZr2qgQ~~0_35.JPG
If you have a spare USB cable that you don't care if you never use it again:
Cut it in half, and strip the sheath from the cable on the end that usually plugs into the computer
Cut the white and green wires off (or white and blue)
There should be two remaining wires, red and black, strip them so there is just the actual wire (the metal strands)
Now look at your battery, there will be four notches, in it, one will be marked (+) and one will be marked (-)
Fold the wire inhalf from the red wire so it is a bit thicker, and just twist it a bit so it hugs itself, SLIDE THE RED WIRE INTO THE SLOT MARKED (+)
Fold the wire inhalf from the black wire so it is a bit thicker, and just twist it a bit so it hugs itself, SLIDE THE BLACK WIRE INTO THE SLOT MARKED (-)
Use some tape to make sure the wires don't touch each other and are secured in place, then, plug the USB plug into your computer
the battery will start charging, it will take about 2 hours to fully charge, it is almost impossible to overcharge the battery as they have a built in overcharge protection circuit.
*intermission music*
~ about 2 hours later ~
Congratulations! Your battery is charged! You can now do stuff that you need a charged battery for.
WARNING I'M NOT RESPONSIBLE FOR ANYTHING EVER PERIOD
Who cares about what happens to a cable thoug
Sent from my DROID3 using Tapatalk
Thanks for the help, after reading about the TBH factory cable I want it whatever the outcome. I am trying the usb to battery trick right now, lets see if i can manage not to f that up. Thanks for all the input. I will post again if i get this usb battery trick completed
does it have to be a phone usb or can it be any old usb, im using an old printer usb. will the battery get warm, beacuse i tried it once for a hour the checked to see and its still dead. trying again double checking my connect and tape jobs.
Well, I'm cleaning off my rusty butter knife and putting it in the drawer. There is no more reason to cut myself, this brick be a phone again. Thanks so much for all the help from everyone. Fix it by using the usb straight battery charge trick, then used rsd to flash the swu recovery files(after many failures, then worked with no change in what i did). Anyway i feel i can breathe again, i'd smoke a bowl with everyone who helped if i could.
Same thing happened to me!
I overnighted this bad boy. http://www.amazon.com/Anker-Multi-P...32KY/ref=sr_1_2?ie=UTF8&qid=1317611805&sr=8-2
Charged the battery enough to RSD the files back. Radioshack didn't have any extra batteries or external chargers nor did Verizon. The assistant manager told me to go on Ebay for a battery. The link above saved my life essentially.
dannyblast said:
does it have to be a phone usb or can it be any old usb, im using an old printer usb.
Click to expand...
Click to collapse
Nope, can be any USB cable that has the power wires and a plug that plugs into your computer.
dannyblast said:
will the battery get warm, beacuse i tried it once for a hour the checked to see and its still dead. trying again double checking my connect and tape jobs.
Click to expand...
Click to collapse
It depends, if the battery is VERY flat, and you have pretty much nothing else plugged into your computers USB ports it may get warm - or if you put it in the wrong slots on the battery.
The flatter the battery, the more current it will require to charge, especially initially.
The less devices on your computers USB, the less of the current coming from the internal USB hub is used. Each power on a computer is rated for 5v @ 500mAh, but there is generally only one polyfuse for all the USB ports on the computer, meaning if you have 12 USB ports in total on the computer you could probably draw 5v @6Ah from a port - not that I would ever recommend this.
The more current, the more heat.
If you put the wrong wires in the wrong slots, it shouldn't matter, the batteries protection circuit (and the polyfuse in your USB controller) would save most mistakes. Generally, the batteries IC will prevent them from providing more than 1A at the batteries current voltage, and using more than 1A, as well as preventing them from going below a minimum discharge voltage (generally around 3.6-3.7v), and a maximum overcharge voltage (4.2v)
dannyblast said:
Well, I'm cleaning off my rusty butter knife and putting it in the drawer. There is no more reason to cut myself, this brick be a phone again. Thanks so much for all the help from everyone. Fix it by using the usb straight battery charge trick, then used rsd to flash the swu recovery files(after many failures, then worked with no change in what i did). Anyway i feel i can breathe again, i'd smoke a bowl with everyone who helped if i could.
Click to expand...
Click to collapse
Glad I could help.
I have good news none of your phones are bricked just follow my instructions...
GET ALL THE FILES NEEDED FROM LINK BELOW!
http://forum.xda-developers.com/showthread.php?t=1255198
HOW TO FIX YOUR SOFTBRICKED DROID 3
Files Needed:
-------------------------
1.RSD LITE 5.4.3 OR LATER
2.XML FILE and all Partitions in image form
to obtain these just download my package below.
Flashable Zip:
You will still be able to update if you flash this file.
Software version: cdma_solana-user 2.3.4 5.5.1_84_D3G-55 110812 release-keysMDM6600BP_N_03.18.29P (Software and Radio versions in bold) aka Release version 5.6.890
http://www.necrotania.com/Download/swu.zip
MD5SUM: 09069555efc6c49b537f49db782a1c94
Verizon/USA and production keys signed. It is not modified in any way. Hopefully it can help unbrick some people/prevent future bricking fears =)
Attached file is the xml from the zip
Moto-fastboot
You will need a different version of fastboot to flash larger files like the system.img. Moto-fastboot allows flashing files over 256 or so MB.
Windows: Moto-fastboot for windows thanks to romracer. Direct Download Link
Linux/Mac: Moto-fastboot for linux in several flavors thanks to eval-.
RSDLite 5.5.0:
http://mophoforum.com/the2dcour/RSDLite5.5.rar RSDLite 5.5.0 Download
It's a new version. I haven't seen a newer version posted though I think up to 5.5.x exists already. DOWNLOAD ALL THESE FILES!
----------------------------------------------------------------------------------------------------------------
Step1, Open the zip with the xml and partitions put them in a folder named XT862
Step 2. Turn your phone on, Hold both Volume buttons while turning on press Vol - until you get to AP Fastboot then press Vol +
Step 3.Plug the phone to your computer by usb while in AP fastboot mode
Step 4. Open RSD lite and select the phone, and the file to flash is inside the XT862 folder you just made, Select the XML file, i believe it will be the only file you can select out of that folder in RSD.
Click START and in about 5 mins your phone will be as new on the latest firmware as of the time of this posting.
bgdwiepp said:
WARNING I'M NOT RESPONSIBLE FOR ANYTHING EVER PERIOD
Click to expand...
Click to collapse
yes...you..are....
You cant flash the sbf on rsdlite?

P9 died??

Huawey P9 3gb 32GB single sim.
My wife accidentally let 10/20 seconds in water (swimming pool).
It was on once left out of the water, as my wife hasnt Knowledge about it doesnt consider to power off inmediatelly.
Device powered off itself.
I dont Know if powered off caused for water ingress os simply battery drained.
Now device :
Dont let me fastboot
Dont show anything on screen even when chargind and of course it does not power on.
So seems a totally brick.
As I am reparing everyday automotive electronics (my job) I decided to open it, removed battery and inspect.
I cant believe I cant see almost nothing.
I mean no water, no rusted component, no corroded area....
But I decided to clean carefully every pcb, connector with alcohol isopropylic.
As I said it looks pretty well but I tried.
Phone keeps died
Is there any chance my problem is software?
I mean if device powered off suddenly it could corrupt?
But How can I recover device without having even fastboot...
To be honest I am ver dissapointed, ive seen many times pcbs with lot of rust cause of water ingress and simply cleaning and resoldering works.
Mine seems almost perfect but is totally dead/brick and doesnt Know really the way to go
In my Job Automotive electronics Ive many schemes testing points etc that allows me to search problem but there are no this info for our device , really?
NOTE: Ive not tested with other battery I am trying to find one to test.
Any help will be appreciated.Hello I need help from people same experience
8Boot to Fastboot:
Connect to PC, press in parallel Vol- & Pow.
You said it doesnt boot.
Boot to EMUI Recovery (or TWRP):
Not on USB, Vol+ & Pow
Boot to eRecovery:
Connect by USB to charger, Vol+ & Pow
If it doesn't boot any way, and doesn't show anything when connected by USB to charger, and if PC does not recognize as USB device when connected - then it is dead.
In Cases of software malfunction it would boot some way (at least to Fastboot) and/or will show something on the screen
But if there was no rust or visible damage, maybe it has wet detector - try by giving to the service shop (guarantee void but maybe they can repair for relatively cheap)
Yes its dead omg... Water killed it. What more do you want to know? you cant rescue it.
Ok to your answer but I keep thinking it has solution.
Ive compared voltage in battery a couple hours with charger connected.
It is charging, very litlle but it does.
And I cant believe with so little water mobile dead....as Ive said I see many pcbs literally whole corroded with mobile powering.
If you see picture of PCB seems impossible than device were dead.
I think could be a battery problem?
How can I warranty buttons are working???
And what about the mini pcb down where usb is connected???? If it is bad how then it will go to fastboot...Usb connection will be useless
Even when big pcb is the problem it could be reparaible or at least testable.
But I do not have this info, I mean testpoints, check the feeds etccc
I tested all marked 0 resistors and seems ok.
In fact easy question is DEAD.
But I want to keep fighting, these are my life rules and I want to keep trying at least testing to Know what is the problem.
If finally MAIN PCB is dead (MOST POSSIBLE)I will consider to buy one PCB/or PCB donor from a scartched unit.
As I said due to my Job I have tools enougth to check electronics and at least Knowing whats the matter.
Never surrender :good:
I dont think its the battery problem. More like motherboard.

Connect usb c directly to the battery

I got this used moto g6 xt1925-12 and it's having an issue where it's not charging in any normal mode
It does charge in fastboot mode but only up to 70%
There are no charger or cable issues as I already verified it and works with another phone
I am thinking there some chip or control device that is not recognizing the usb when I plug it in in normal mode so I was wondering if I could bypass whatever is controlling it and connect it directly to the battery
If I had a schematic I would try to see what is controlling it and perhaps replace it if that is even available on the market but without that I have to use brute force
So I was wondering if there are any electronics experts or perhaps someone who knows how a usb c is generally implemented in a phone or more specifically in the moto g6
Would connecting the usb c directly to the battery cause any problems ?
Even though you verified that your charger and cable both work with another phone, I would still try different combinations of cables and chargers. Various things can happen to both cables and chargers that render them less effective (a cable can have one internal wire fail, a charger can have a resistor fail, etc. etc.). Also, some devices are more persnickety about the power they receive than others. My GoPro Hero 5 Black was able to charge its battery and interface with my computer through a USB type C cord that didn't work with my Moto G6 at all.
That said, I can't offer much help additionally. Given the cost of a Moto G6, I doubt it's worth hours of soldering to get your battery working normally again. You might want to look into a replacement battery from eBay, but even then, you might still have issues because as you said, there could be a fault with one of the chips that manages charging. Allowing the battery to fully discharge once or twice might be worth trying.
Sorry, wish I could be of more help.
pkScary said:
Even though you verified that your charger and cable both work with another phone, I would still try different combinations of cables and chargers. Various things can happen to both cables and chargers that render them less effective (a cable can have one internal wire fail, a charger can have a resistor fail, etc. etc.). Also, some devices are more persnickety about the power they receive than others. My GoPro Hero 5 Black was able to charge its battery and interface with my computer through a USB type C cord that didn't work with my Moto G6 at all.
That said, I can't offer much help additionally. Given the cost of a Moto G6, I doubt it's worth hours of soldering to get your battery working normally again. You might want to look into a replacement battery from eBay, but even then, you might still have issues because as you said, there could be a fault with one of the chips that manages charging. Allowing the battery to fully discharge once or twice might be worth trying.
Sorry, wish I could be of more help.
Click to expand...
Click to collapse
Thanks for the reply and trying to help
The phone I verified with is the exact same model xt 1925-12 so I am sure the charging system outside of the phone is fine I also bought a new battery and just plugged it in to see if that makes any difference which it did not and just last week I replaced the charge port and while that looked a little dirty and was missing one pin on the end which upon looking at a pinout found out to be a ground pin of which there is more than one so of course that did not make any difference
I understand it's a cheap phone I just like to get to the bottom of the problem if I can and perhaps do a little troubleshooting inside the phone
There has to some chip inside that controls everything since it's charging in fastboot mode but not in any other mode
I just have to try it and see what happens
Status1one said:
Thanks for the reply and trying to help
The phone I verified with is the exact same model xt 1925-12 so I am sure the charging system outside of the phone is fine I also bought a new battery and just plugged it in to see if that makes any difference which it did not and just last week I replaced the charge port and while that looked a little dirty and was missing one pin on the end which upon looking at a pinout found out to be a ground pin of which there is more than one so of course that did not make any difference
I understand it's a cheap phone I just like to get to the bottom of the problem if I can and perhaps do a little troubleshooting inside the phone
There has to some chip inside that controls everything since it's charging in fastboot mode but not in any other mode
I just have to try it and see what happens
Click to expand...
Click to collapse
I think I found something that may be a little safer than a direct jumper
I came across a video on Youtube where the guy installed a diode The video was about fake charging so that's not exactly my problem and it was on an older phone with micro USB and not USB C but in theory this may work
There was also another video on changing the ic charge ic on an Iphone 6 which was a BGA I am not even sure where the charge ic is located on the Moto G6 but if it's a BGA I don't want to mess with it unless I have to plus it's probably not even available to buy anywhere so I think I will go with the diode method first and see if that does anything

P10 testpoint - how to activate?

So I am trying to activate the testpoint on the P10, as it is mentioned in several tutorials, e.g. here:
https://forum.xda-developers.com/p10/how-to/unbrick-p10-vtr-l09-vtr-l29-unbrick-t3916694
However, I could not get the device to register as an USB serial device and it is unclear to me how to achieve this - how exactly do I shorten the testpoint? I could not find any Video or similar information. Do I need to shorten it all the time, or just for a few seconds? Does the device have to be turned on or turned off? Should I turn it on while shortening the testpoint?
its simple, u must unplug batery, usb cable, take any metal think (a wire exemple) and connect test point pin to metal shield on mother board, while u hold short, plug usb cable and in device menager u will see usb serv (if no driver installed) or com 1.0 (if driver installed) then u take back short, plug batery and u have what u want
https://prnt.sc/qycuet test point
a metal thing ex https://prnt.sc/qycus2
Thank you, I was not aware that I had to unplug the battery!
okay, battery must be unplugged firstly.
using testpoint method to tryn fix a interupted flash (battery died mid flash, yikes)
in my experience this erases imei save yuor imei folks

Mi 8 test point not working

I got the back off my phone, disconnected the battery, paid someone to fix it remotely, connected by USD, shorted the test point pads and nothing. EDL won't activate however many times I try and for however long I short the pads. Is there anything else I can try or anything I might be doing wrong? The wire I'm shorting with is definitely conductive.

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