Question Redmi 9T suddenly blackout after rebooted accidentally - Redmi 9 Power / 9T

Help me please. Just now my Redmi 9T doesn’t want to open after I accidentally rebooted it after charging. I already tried the long press power button also the volume up and down.

Is it overheated?
Will it power on with the charger connected?

It’s not over heated. No, the power won’t open even if I tried to charged it again. My friends said that it’s dead boot and idk what that is.

Sounds like a mobo failure.
Maybe someone here has seen this before.

Someone said from a group that it’s a system failure update.

maeyyang said:
Someone said from a group that it’s a system failure update.
Click to expand...
Click to collapse
Bricked? Damn...
I don't update my 10+... now you know one of the reasons why.

You may have no other option but to bring that thing to a service center near you

@maeyyang can I ask if you updated its system prior to the incident?

I also am encountering this problem you posted. How's your phone now?

I also facing this issue.. any updates on your device?

Delabytes said:
I also facing this issue.. any updates on your device?
Click to expand...
Click to collapse
brought it to the nearest service center, they said i have to wait for 1-2 months :/
they said that it's a mainboard's problem

I search videos on YouTube. The same issues occurred on Poco M3. They said that the issue is on the main board, specifically the power IC.The solution is just reheating the soldered IC on the board.
Here is the sample video:

Delabytes said:
I search videos on YouTube. The same issues occurred on Poco M3. They said that the issue is on the main board, specifically the power IC.The solution is just reheating the soldered IC on the board.
Here is the sample video:
Click to expand...
Click to collapse
That's a BGA. The heat has to be precisely controlled with a hot air station by someone that knows what they're doing. Too little heat/time nothing happens, too much you destroy it and the PCB maybe too.
These are the hardest SMs to deal with.
There's no guarantee that that's the problem and no way to inspect it without a factory test rig*.
All the contacts are underneath. It maybe another SM component that has the cracked solder joint. There are a lot of components in the power section. That maybe a common problem but not the only one...
*you can try gently pressing down on the chipset to see if it triggers an event.

I think it's better to just take it to the service center for the mainboard replacement and I heard about users who did the same method in the video had recurring problems after doing that.

Opening the back cover of the handset also voids the warranty and that's really bad.
derunheimlich said:
I think it's better to just take it to the service center for the mainboard replacement and I heard about users who did the same method in the video had recurring problems after doing that.
Click to expand...
Click to collapse

Related

[Q] Any touchscreen issues?

Guys i read on some forums that Mi3 has touch problems like over touch sensitivity and many users are facing it...is there any user here who facing it or it's an hoax? I have ordered one yesterday and i am worried about it..i was fed up of touch on my old phones..please help
I am also experiencing this touchscreen sensitivity issue. Even just hovering my finger on the screen it already responds. Glove mode is off, even tried it while its on, still the same. Did a calibration, no effect. Anyways, it just causes some accidental touches but it does not mess up the entire experience.
Raj joshi said:
Guys i read on some forums that Mi3 has touch problems like over touch sensitivity and many users are facing it...is there any user here who facing it or it's an hoax? I have ordered one yesterday and i am worried about it..i was fed up of touch on my old phones..please help
Click to expand...
Click to collapse
its a myth or because of a faulty device.
if it occurs only while charging then it can be the power socket that you are using. (usually occurs if your phone i still plugged in after it has been fully charged. happened on my s3, galaxy s duos and grand duos as well)
could be because of using local charger, faulty battery, basically anything that can mess up the voltage and interfere with the touch screen (but only while charging) very rare chance almost one in a million that somehow a faulty battery causing this.
no such problem on my dad' Mi3 and i ordered it during the first flash sale of Mi3 in India. no issue or problems in the phone so far.
Kapiljhajhria said:
its a myth or because of a faulty device.
if it occurs only while charging then it can be the power socket that you are using. (usually occurs if your phone i still plugged in after it has been fully charged. happened on my s3, galaxy s duos and grand duos as well)
could be because of using local charger, faulty battery, basically anything that can mess up the voltage and interfere with the touch screen (but only while charging) very rare chance almost one in a million that somehow a faulty battery causing this.
no such problem on my dad' Mi3 and i ordered it during the first flash sale of Mi3 in India. no issue or problems in the phone so far.
Click to expand...
Click to collapse
I am having this issue of mis-touches while charging.
I touch somewhere and it actually gets touched somewhere else.
Using latest stable rom v23 (India) and using stock charger.
What can I do to solve this? Take a replacement of phone or the charger?
smeet.somaiya said:
I am having this issue of mis-touches while charging.
I touch somewhere and it actually gets touched somewhere else.
Using latest stable rom v23 (India) and using stock charger.
What can I do to solve this? Take a replacement of phone or the charger?
Click to expand...
Click to collapse
you can try different charger and different power socket which will eliminate faulty charger, cable or irregular power supply. if even after testing all this you still have problem better take it to nearest service centre because if its battery's fault let the service centre guys take care of it. don't do anything that may void warranty.
Kapiljhajhria said:
you can try different charger and different power socket which will eliminate faulty charger, cable or irregular power supply. if even after testing all this you still have problem better take it to nearest service centre because if its battery's fault let the service centre guys take care of it. don't do anything that may void warranty.
Click to expand...
Click to collapse
I have tested it with my Note2 stock charger and it still has same issues.
Still will test it out for some days and then decide.
By the way the phone is not one month old so should I take a replacement from flipkart? Or go to a service center?
smeet.somaiya said:
I have tested it with my Note2 stock charger and it still has same issues.
Still will test it out for some days and then decide.
By the way the phone is not one month old so should I take a replacement from flipkart? Or go to a service center?
Click to expand...
Click to collapse
Go for a replacement. drop an email right now before 30days time period is over. If you are facing this issue only while charging then there is very low chance of it being device fault.
Kapiljhajhria said:
Go for a replacement. drop an email right now before 30days time period is over. If you are facing this issue only while charging then there is very low chance of it being device fault.
Click to expand...
Click to collapse
It is a battery fault I think but since the battery is non removable can't do much.
Is your charging point earthed properly.. Mis touch problem is caused due to improper earthing
hum does it have touchscreen problems?
i mean like the ONEPLUSONE?
if so i don't want it. i mean i didnt chois the oneplusone cause off that. my screen has to work 100% fine or i'm going mad
Pranav1909 said:
Is your charging point earthed properly.. Mis touch problem is caused due to improper earthing
Click to expand...
Click to collapse
Yes it is earthed properly coz the others phones charge without any issues. I even checked the charger. Its all fine.
I had ghost touch problems when USB charging from my laptop...it was cuz I'm using a third-party charger for my LAPTOP charger...when I remove the laptop from AC power, no ghost touch...
So basically, I doubt there is any problem with the device itself (except for the fact that it is so sensitive to improper charging unlike other devices) but I don't think getting a replacement will help. Just use the supplied charger, on a properly earthed socket.
I had this same touch problem. Actually the problem is that the touch misses. What I mean by that is, draw a straight line from one end to another and in between the touch misses and you get a broken line at many points. I cheked it using the Hardware Test function and going into "Touch screen Test". Start to draw a line and see what happens. It will miss after every 1 sec or so.
So, i tried to find the cause. And i came to know it mostly happened when the phone was put on charging and mostly made the phone unusable while charging. It also occured after taking the phone off the charging if it was overcharged. So I used charger of Samsung Note 3 and voila. The problem is gone.
Summary : Charger supplied with Mi3 is piece of s#it. Dont use it. It will damage the screen with static charge that is left on the screen after charging. Get yourself another good quality charger.
I have noticed this problem. There is touch input even while hovering finger about 3 mm above the screen. I don't mind this problem that much but it does become a minor annoyance sometimes while typing. I don't want to apply for a replacement though as the phone is flawless otherwise and I've heard that even the replacements also have the same problem. I have not yet removed the protective screen cover which comes with the phone so I don't know whether that's causing the issue.
Update: I have applied a tempered glass screen protector and the problem is still present.
Sent from my MI 3W using XDA Free mobile app
I noticed yet another problem. The multi-touch is OK for about 4-5 fingers. But above 5 fingers, the touch gets haywire. Ghost touches, touches not getting registered, touch points swapping, etc start to happen very badly. Is anyone else facing this issue? I tested using antutu benchmark.
Sent from my MI 3W using XDA Free mobile app
Sadly i experience the same issue. The screen gets hypersensitive from time to time. I've had my MI3 only for a week now. Considering doing a factory reset. Any experience?
gauco said:
Sadly i experience the same issue. The screen gets hypersensitive from time to time. I've had my MI3 only for a week now. Considering doing a factory reset. Any experience?
Click to expand...
Click to collapse
Go to hardware testing and then to touch sensor and hit menu button and calibrate
My mi3 touchscreen is fully working after 7 months (and i hope even in the future).
Hi,
If you are experiencing serious issues like miss typing and random unwanted button pressing by the phone then this is for you! I recently woke up and found my phone spazing out and not being able slide the screen up properly. So this is what worked for me and hopefully will fix your issues too!
1. Install any updates that need doing. Restart phone.
2. Still have problems then turn off glove mode ( settings and then display) and clear and wipe cache. Do this by holding down the up volume key on the side and power button - wait until the screen goes black and then it should appear in recovery mode. Use volume buttons to select the language and the power button to enter. Go Wipe and Reset and then Wipe Cache. See if that works. If it doesn't please look at Step 3.
3. Now try refiguring and calibrating the touch screen through the hardware menu. This was painful for me as all the buttons i wanted to press hit another key! but eventually got it. Try to key this into the phones key pad and call: *#*#64663#*#*
4. You are now at the hardware menu. Find touch screen and then the black screen appears where you can your finger over and draw. Use the button next the home button to get the start calibration menu ( looks like this 三)
and then hit start calibrating and wait for it to work. I actually need to go into setting to change button layout as only apps appeared when i pressed there....
This then solved all the issues and my phone now works perfectly
Let me know if it worked for you!

[Q] Q scrolling display problem

Hello all
My watch has developed a strange display scrolling problem when active watchface is displayed since lollipop update.
Please see the following video to explain the problem.
Have tried to reset via the menu to fix the problem . after reset it works for a few minutes but then it comes back. I feel this is a software fault
Any ideas chaps?
Thanks
PebbleBed said:
Hello all
My watch has developed a strange display scrolling problem when active watchface is displayed since lollipop update.
Please see the following video to explain the problem.
Have tried to reset via the menu to fix the problem . after reset it works for a few minutes but then it comes back. I feel this is a software fault
Any ideas chaps?
Thanks
Click to expand...
Click to collapse
bro..im having the same issue..have u manage to rectify it?
I was advised by LG support to return it to the distributor
they initially told me to go back to lg but in the end they gave me a RMA
Now waiting for a repair or replacement watch. Fingers crossed
I had the same symptoms as well. When through LG's customer service to get an "RA" number. I was pleasantly surprised that LG provided pre-paid shipping through FEDEX. I received it back in a little over a week. It appears to be a new watch altogether, as the the front display didn't have the screen protector I put on it, as well as the band looking pristine. So it appears that this wasn't a software issue, but a hardware failure. It was surprising that it didn't have the latest firmware installed, but I'm still happy I have a functional LG Watch R back again! Make sure you keep the invoice/receipt to provide proof of purchase for free warranty service.
I have the same problem in my particular case happen after flashing the Urban ROM ... also think is a sofware problem ... any suggestion, i dont live in the USA and sending the watch to warranty will take months....
How to fix it?
Sorry for popping this thread. I have the same issue. My watch is 10 moth old. I tried to contact LG USA support, but for some reason they don't take responsibility for it. I definitely got my lesson regarding LG support
Did anybody managed to fix this problem? As for now I have $$$ brick
My watch has now developed this problem too but i am on marshmallow.
Would flashing 6.0.1 on the watch fix it does anyone think?
I cannot bring it back to LG as i bought it second hand
Any ideas to fix would be greatly received
I have the same problem, Did anybody managed to fix this problem?
I had the same issue. To solve the problem you need to remove the mainboard from your watch and do a reflow procedure with the mainboard.
A simple way to do it is to put the mainboard in a oven and heat it op to about 100 degrees celsius for about 5 minutes. Remove it from the oven and let it cool down.
Assemble your watch and power up.
problem solved
rijkerhc said:
I had the same issue. To solve the problem you need to remove the mainboard from your watch and do a reflow procedure with the mainboard.
A simple way to do it is to put the mainboard in a oven and heat it op to about 100 degrees celsius for about 5 minutes. Remove it from the oven and let it cool down.
Assemble your watch and power up.
Click to expand...
Click to collapse
You are the best, my friend, precisely the problem solved in this way.Thank you very much. :good:

Sudden death and...root !

My phone decided to not switch on any longer. The only sign of life is the notification led blinking red when is in charge, no way to access it with any program if I attach it to the PC with a USB cable.
I should send it to the Sony repairing center (still under warranty) but the phone is rooted; given its situation do they discover it ?
I had that exact problem. Turned out that the battery suddenly died after about a year.
In my experience they never care what stuff is currently on the phone. Instead they'll just flash it with the latest stock rom after fixing the hardware.
Thanks a lot for sharing your experience. I really hope will be the same in my case as well. I'll post here what will happen.
PS I'm wondering about the batteries' quality: my daughter with a z1c had your same problem (a little more than one year life), you, may be myself... I know the sample is not significant but...
Same thing happened with mine & i was on a custom rom with unlocked bootloader...they probably had no way to get into the phone just like i couldn't so they probably couldn't tell it was modified...it was just a brick at that point...i noticed certain batches were affected by this sudden death and after pulling my tag out i noticed my phone was part of that batch that was poorly assembled in china...so brand new phone for me!
Fictional Reality said:
Same thing happened with mine & i was on a custom rom with unlocked bootloader...they probably had no way to get into the phone just like i couldn't so they probably couldn't tell it was modified...it was just a brick at that point...i noticed certain batches were affected by this sudden death and after pulling my tag out i noticed my phone was part of that batch that was poorly assembled in china...so brand new phone for me!
Click to expand...
Click to collapse
OK, another positive experience. I cross my fingers and I'll post what will happen to me
I have the impression they dont even check the software, they just flash a new fw and thats it. Or they dont care.
My phone locked up on me like this, but I solved it by pushing a pin into the reset button hole.
Geoff2 said:
My phone locked up on me like this, but I solved it by pushing a pin into the reset button hole.
Click to expand...
Click to collapse
Thanks for the suggestion but I tried any possible way to resurrect my phone, including what you're saying, without any result. I hope to confirm soon what all the contributors to this thread are saying...
Just received the device from assistance; everything went well: the motherboard was replaced.
The only drawback is that the lost the tiny grill that cover the mic at the bottom of the phone !!!!!

No Audio after screen replacement

Hi,
I really need your help as I have no idea what to do.
After 1 month of using MI5 Pro Ceramic black I have broke my phone,First the touch worked and there was only vertical lines on the lcd in the spot of the shatter so I could operate but due to my stupidity and of force touching the broken glass these vertical lines started to cover all the screen (Everything worked well on the phone..Sound,Camera and etc..)
So I ordered from Aliexpress LCD + Touch screen for about 70$ (Included DHL Express shipment)
When I got the screen I started to disassamble the phone.. Got everything out,Took out the broken screen and pasted the new screen on the frame (Must say all these aliexpress screens are really bad,0% protection on the screen,Not sure about the LCD quality yet but glass is horrible..Started to scratch even before I used it)
Anyways to our point..
Started to assamble back everything.. Powered on the phone and Yay! Phone is working but...
No Sound,Firstly I checked settings and everything..Ran CIT test and everything that belongs to audio giving force close..
Calibrate Speaker PA test results : State-Get impedance failed!,Speaker Vendor-None
Vibration- FAIL no short and no long
Main mic speaker Feedback,Simulation call test,Front mic speaker feedback test,Top mic speaker feedback test,
everything when I enter it giving FC with that details :
"IlegalStateException:Unable to retrieve AudioRecord pointer for SetParameters() blablala...
Headphone mic feedback test (Called on an uninitialized AudioRecord)
So in short..
No Speaker,No Mic,No headphone Mic..
Now my question is what I need to do from now.. Its not firmware/software problem for sure as before I disassambled the phone everything worked well..
My first guess was the problem is on the Sub PCB but then I asked my self..If the USB-C is working and WiFI antenna giving full signal it means the Sub PCB works so what the hell is the problem? I really hope its not something in the PCB it self as it means throw everything to garbage.. ;<
Hope to hear suggests..
I thought to order the MI5 32GB Black version take out the Main PCB put the Pro Main PCB and put also the ceramic back cover but that I would do only if I know that the problem is from the sub PCB but if Headphone mic doesnt work (Which the Main PCB take care of) then its probably in the Main PCB??
Please help!
you didnt damage the pins on the press connector? is the press connector on the ribbon cable flush / fully inserted ? Are you sure you didnt kink the ribbon cable?
I haven't pulled a mi5 apart, but can only assume its like every other phone i have.
leighaus said:
you didnt damage the pins on the press connector? is the press connector on the ribbon cable flush / fully inserted ? Are you sure you didnt kink the ribbon cable?
I haven't pulled a mi5 apart, but can only assume its like every other phone i have.
Click to expand...
Click to collapse
The problem is that far as I understood of how the mi5 built and from how I saw it looks like..The Speaker located in the Sub PCB cover,Vibrate connected to subPCB,And all the SubPCB connected with the cable to the main PCB and I checked it connected good and no any damaged pins from what I was able to see..If there was damaged pins then the phone wont get charged as the USB-C wont be connected as it located in the SubPCB however it does work.. So I really have no idea what cause it..
Also the Headphone mic doesnt work in the tests..Anything related to Audio giving that FC with "AudioRecord" error..
I really must to know what causing it so I will know what to do ;<
Little update,
Just connected a bluetooth speaker,No any sound nothing..
Hi everyone! My MI5 has the same problems, no sound, mic, vibration, led buttons light, plugin earphones without notification's icon, can not play music, video offline and online video (Youtube, Facebook, live stream ..). It was happened when i replaced brooken screen. The first time when I turn on, evetything ok, I can play music through speaker, but now everything has gone..! Plz tell me how to slove this problem! Sorry for my poor E!
Hi, I ended up on buying the phone again... It's impossible to fix that problem as probably you did what I did and didn't place the motherboard correctly so a little bent probably happened and that cause to the problem.
edoroom said:
Hi, I ended up on buying the phone again... It's impossible to fix that problem as probably you did what I did and didn't place the motherboard correctly so a little bent probably happened and that cause to the problem.
Click to expand...
Click to collapse
Hi there! Care to elaborate a little more? I have also the same problem. I was replacing the rear camera module while the module I had received was broken to begin with. I hadn't really figured this out initially and I tried several times to attach it and test it, perhaps move the flex and retest, and at some I remember I found out the vibration was not there, but didn't pay attention to it as everything was open, until I found out the camera module was faulty in the end, and subsequently discovered also the whole issue with sound/vibration/key backlight etc. Instead of buying a new device, I was thinking to try and fix it, but still I'm a bit unsure about what the problem really was. From what I could figure, I didn't do anything different this particular time the audio/vibration didn't work, with respect to the previous times I attached and detached the motherboard. But is it definitely the board itself and not its flex connecting it to the sub-pcb? Could it be the sub-pcb itself or even both this and the board? In case I buy a new board (perhaps together with a sub-pcb just in case) to replace it which part should I watch out for, not to damage it again. Sorry for the many questions but you seem to be the only source of info for this specific problem.
deusxx said:
Hi there! Care to elaborate a little more? I have also the same problem. I was replacing the rear camera module while the module I had received was broken to begin with. I hadn't really figured this out initially and I tried several times to attach it and test it, perhaps move the flex and retest, and at some I remember I found out the vibration was not there, but didn't pay attention to it as everything was open, until I found out the camera module was faulty in the end, and subsequently discovered also the whole issue with sound/vibration/key backlight etc. Instead of buying a new device, I was thinking to try and fix it, but still I'm a bit unsure about what the problem really was. From what I could figure, I didn't do anything different this particular time the audio/vibration didn't work, with respect to the previous times I attached and detached the motherboard. But is it definitely the board itself and not its flex connecting it to the sub-pcb? Could it be the sub-pcb itself or even both this and the board? In case I buy a new board (perhaps together with a sub-pcb just in case) to replace it which part should I watch out for, not to damage it again. Sorry for the many questions but you seem to be the only source of info for this specific problem.
Click to expand...
Click to collapse
Hi sorry for late answer,I barley visit xda these times..
After I bought the MI5 again this time in the 64gb version I tested the old 128gb motherboard (The main one) and still same problem with Vibration/Sound (While all sensors work camera too)
Which means its not the sub-pcb problem,Its the main motherboard for sure,Now what cause it?
In my opinion when I pulled of the motherboard to put it on the new screen I insert it in a bad way which made it bent a little and probably the place I bent is where the audio and all the stuff goes on..
I'm pretty sure we cant really do something about that problem as problem related to motherboard it self are usually not fixable,But if you find something I will glad to get a feedback to test on my own bad motherboard so maybe I can back to the 128gb version ;| but I doubt it..
edoroom said:
Hi sorry for late answer,I barley visit xda these times..
After I bought the MI5 again this time in the 64gb version I tested the old 128gb motherboard (The main one) and still same problem with Vibration/Sound (While all sensors work camera too)
Which means its not the sub-pcb problem,Its the main motherboard for sure,Now what cause it?
In my opinion when I pulled of the motherboard to put it on the new screen I insert it in a bad way which made it bent a little and probably the place I bent is where the audio and all the stuff goes on..
I'm pretty sure we cant really do something about that problem as problem related to motherboard it self are usually not fixable,But if you find something I will glad to get a feedback to test on my own bad motherboard so maybe I can back to the 128gb version ;| but I doubt it..
Click to expand...
Click to collapse
Many thanks for the response! It sheds a little light indeed. I also ordered another phone to replace it as the cost of the motherboard seems to be equal approximately close to a new device. I'm with you, in the same view, I also once placed the motherboard quickly in the chassis without the screw that holds it together, in one of the 50 or so attempts to try and make the camera sensor I was replacing, visible to the OS, and this looseness was the unfortunate one perhaps (?). I too don't expect the sound to work again. I just wanted to double check the issue was not with the sub-pcb, which I did thanks to you. For sure I have no hopes for the mainboard to work again, but still, what keeps me from being certain it is actually the sound card that is the problem, is a very similar case I saw In a foreign forum, and also clues from my device which support the argument that the mainboard might have entered in a kind of diagnostic boot state due to a hardware fault that was apparent, where either some components are not initialized during boot, or their HW resources are taken over from the diag. ports and irqs that are enabled, in which case the issue can perhaps be fixed. For sure whenever I find a good deal on a new motherboard I will replace it, to keep it as a secondary phone, as I liked it quite a bit, but It would be interesting to see if this hypothesis holds or not. Anyway thanks again for the response!
Hi,
I've bought used mi5 with broken screen. After LCD replacement I've found that that phone has problem with sound. Exactly the same as in this thread - no sound, mic, vibration, led buttons light, plugin earphones without notification's icon, can't play music, video offline and online video (Youtube).
Someone already did LCD replacement on this phone and probably done something.
But what I discovered on this phone that problem start when battery charge aprox more then 60%.
I did flash one year old ROM via fastboot ( just to verify if it not the ROM problem) and after that everything was fine ( battery level 50%).
I did hardware test - passed 100% fine.
But when I did charge till 100% the problem come back.
That's really interesting finding... Can you tell me the same steps you did like which rom you flashed and all of that? I will check it with my dead phone maybe if I will have the same thing like you we can point on something...
mi5 lcd replaced touch not working
I bought a mi5 mobile in singapore. My display was damaged. I changed many display in india (checked in many shop). only work display (lcd). Touch not respose. please some one give solution. thank you
have same problem with op
my phone get damaged by water so im rush turn it off and open everything then go to dry it... and problem with speaker etc doesnt work just like op please help i really doesnt have money to buy new phone this month
Exactly same problem with me, just replaced the rear camera and the problem occurs
No sound, no vibration, nav led not working at all, playing video not working
Even playing sound via bluetooth speaker not working too
I believe there is something wrong with the mainboard
can anyone point out which part of the mainboard responsible for the lower board?
The lower board works well though, I tested it using other mainboard
codearm2 said:
Exactly same problem with me, just replaced the rear camera and the problem occurs
No sound, no vibration, nav led not working at all, playing video not working
Even playing sound via bluetooth speaker not working too
I believe there is something wrong with the mainboard
can anyone point out which part of the mainboard responsible for the lower board?
The lower board works well though, I tested it using other mainboard
Click to expand...
Click to collapse
For me the problem was that after the screen replacement (It may also apply to you after you replaced the rear camera..)
When I put back he main motherboard it wasnt sat properly,I put it beneath a small plastic holder and when I closed everything and screw and all..Problem appeared and when I rechecked motherboard I found out it got bent in the right down side and that's probably what killed all the sensors,sound and everything..
Of course that what happend to me..There is plenty of other reasons that may cause to what you experience..
edoroom said:
For me the problem was that after the screen replacement (It may also apply to you after you replaced the rear camera..)
When I put back he main motherboard it wasnt sat properly,I put it beneath a small plastic holder and when I closed everything and screw and all..Problem appeared and when I rechecked motherboard I found out it got bent in the right down side and that's probably what killed all the sensors,sound and everything..
Of course that what happend to me..There is plenty of other reasons that may cause to what you experience..
Click to expand...
Click to collapse
I believe the chip or something similar, that control the sensor, led, vibration etc, was broken because we put it the wrong way
now we need to find which chip it is and replace it
which part of the right down? near the signal cable?
codearm2 said:
I believe the chip or something similar, that control the sensor, led, vibration etc, was broken because we put it the wrong way
now we need to find which chip it is and replace it
which part of the right down? near the signal cable?
Click to expand...
Click to collapse
If you just checked and saw you put it wrong as I did,On the little plastic which made a little bent then I guess you lost..I would just buy new motherboard on aliexpress or just give up and buy a new phone..
As you cant really know (I mean from our side..) if its a chip related there or if its the bent it self which made problem on the connection on the board it self..
And yes I was speaking about the right side near the signal cable where you need to install the motherboard from that side where there is a little plastic like holding the motherboard..When I did the reinstall by not checking I put the motherboard on that plastic and after I closed everything and all screws got back I discovered that problem..
edoroom said:
If you just checked and saw you put it wrong as I did,On the little plastic which made a little bent then I guess you lost..I would just buy new motherboard on aliexpress or just give up and buy a new phone..
As you cant really know (I mean from our side..) if its a chip related there or if its the bent it self which made problem on the connection on the board it self..
And yes I was speaking about the right side near the signal cable where you need to install the motherboard from that side where there is a little plastic like holding the motherboard..When I did the reinstall by not checking I put the motherboard on that plastic and after I closed everything and all screws got back I discovered that problem..
Click to expand...
Click to collapse
yeah, it means it's the same mistake as mine, that little metal thing that hold the motherboard, I forgot to eject the sim card tray and when I pull my main board it was stuck, got a little bent from there
Just wonder if anyone have the schematic for mi5 mainboard, since I'm curious and want to find a way to repair it
Not because I'm in despair of needing a phone, this MI5 is my secondary phone
Just because of the curiousity, that's all
edi--
found the schematic here
https://data.dendik.id/Data/Schematic/Xiaomi/Mi5_SM.rar
now on the journey to repair this stupid mistake, lol
any help from someone who are an expert in this thing will be really appreaciated
codearm2 said:
yeah, it means it's the same mistake as mine, that little metal thing that hold the motherboard, I forgot to eject the sim card tray and when I pull my main board it was stuck, got a little bent from there
Just wonder if anyone have the schematic for mi5 mainboard, since I'm curious and want to find a way to repair it
Not because I'm in despair of needing a phone, this MI5 is my secondary phone
Just because of the curiousity, that's all
edi--
found the schematic here
https://data.dendik.id/Data/Schematic/Xiaomi/Mi5_SM.rar
now on the journey to repair this stupid mistake, lol
any help from someone who are an expert in this thing will be really appreaciated
Click to expand...
Click to collapse
ok bruh im already do some fking around and do ic audio replacement but no hope its still broke even my repair guy who are ex xiaomi worker are give up the problem is looks like from cpu its self but there was something interesting if u try download device info hw app in google play there was warning that the device cant read sys or something cuz it was blocked and when u look at audio chipset its was gone
feel2death said:
ok bruh im already do some fking around and do ic audio replacement but no hope its still broke even my repair guy who are ex xiaomi worker are give up the problem is looks like from cpu its self but there was something interesting if u try download device info hw app in google play there was warning that the device cant read sys or something cuz it was blocked and when u look at audio chipset its was gone
Click to expand...
Click to collapse
Yeah, tried it before, and the audio chip is gone
Perhaps something wrong with the audio chip, will try to replace the IC tomorrow

[Need Help] Note 9 bottom speaker volume level suddenly started to sound muffled

hi there, I have been experiencing this issue with my Galaxy note 9 (SM-N960F/DS). suddenly yesterday day I noticed that the volume the bottom speaker of my phone has dropped drastically, even bellow the volume level of the earpiece speaker, I tried wiping cache and what other stuff I could think of to try to fix the issue but nothing worked.
Finally as my last resort to make sure if maybe it is a software issue and not a hardware one, I factory reseted it, it started to work just fine after that!
But it didn't last for very long, next day, after when I woke up, I noticed the volume has been dropped again. Now I am sure as everyone would understand, resetting my phone everyday is not an option for me
I tried asking Samsung help center but they say I need to bring it in to the nearest service center, which is not an option for me, and who are kidding they don't help, they suck.
SOME INFORMATION regarding my phone
●Note 9 SM-N960F/DS
●Updated to One UI 2.1 a week ago
●I never have had any problem before
●Speaker started to work factory reset have proved that it's a software problem
●Samsung care sucks
If anyone is having the same problem please do post, and anyone who has any idea what's going on please do post too, your help can literally save my life.
Thanks everyone
Hi there
I had similar issue with the ear piece..
Tried all updates etc no avale
Got a dry toothbrush and cleaned over the grills
Worked a treat
Maybe something ie dust etc is distorting the sound
Worth a shot
Eddie
Braggster said:
Hi there
I had similar issue with the war piece..
Tried all updates etc no avale
Got a drybroutjbrush put and cleaned over the grill
Worked a treat
Maybe something ie dust etc is distorting the sound
Worth a shot
Eddie
Click to expand...
Click to collapse
I think that maybe the case too. Or you could take a handheld vacuum cleaner to it with the crevious attachment to suck out any dust or debrie that maybe stuck in the speaker grill
Braggster said:
Hi there
I had similar issue with the ear piece..
Tried all updates etc no avale
Got a dry toothbrush and cleaned over the grills
Worked a treat
Maybe something ie dust etc is distorting the sound
Worth a shot
Eddie
Click to expand...
Click to collapse
Hi Eddie, I would have agreed with you but the thing is that doing a factory reset resolved the problem for me once, then it eventually appeared again, so this indicates that it is a software issue! No?
iceepyon said:
I think that maybe the case too. Or you could take a handheld vacuum cleaner to it with the crevious attachment to suck out any dust or debrie that maybe stuck in the speaker grill
Click to expand...
Click to collapse
But then how did the factory reset fix the problem for me once? I am sure it has something to do with software. Can you think of anything that I should try to fix it supposing it's a software issue (other than a factory reset of course) thanks.
Hmm seeing that you have corrected the issue in the past by doing the factory reset it is possibly a software issue..
Possibly try a reflash using odin?
It won't break your warranty unless you have rooted ij the past..
If that fails take a trip to samsung get it repaired under warranty
All.the best eddie
hi, go to service menu by dialing *#0#*, and test speaker there. this will confirm whether it is hardware or software.
Braggster said:
Hmm seeing that you have corrected the issue in the past by doing the factory reset it is possibly a software issue..
Possibly try a reflash using odin?
It won't break your warranty unless you have rooted ij the past..
If that fails take a trip to samsung get it repaired under warranty
All.the best eddie
Click to expand...
Click to collapse
Hey Eddie thanks for the odin suggestion, I tried it and finally realized that I was just being too stubborn to admit that my phone has a hardware issue. Turns out the audio never got better after a reset, it just felt a bit different as I wanted to be it that way.
Anyways time to admit the hard truth it is a hardware issue and I think won't get it repaired, both speakers now get as loud as an S8 which by any means is not a the best speaker out there, but it gets the job done, thanks for time, Abdul Wahab.
wahab96 said:
Hi Eddie, I would have agreed with you but the thing is that doing a factory reset resolved the problem for me once, then it eventually appeared again, so this indicates that it is a software issue! No?
Click to expand...
Click to collapse
I had the very same problem. After the update. Same phone Other than the phone heating up and taking really long to charge, the speaker output dropped then got flakey. And finally stopped working. All this happened after the update.
Did a reset. Even took it to the service center and let them re-load the s/w.
Nothing helped. In the end both speakers, both mics, and ear jack will stop working.
I traced the problem down to one of two ICs one is the Max98512 or the 9896B.
If your out of warranty they will want to charge you 28,000 + for a new motherboard.
They looked really hard for physical damage and water damage. But my phone is immaculate.
From the showroom got a world-class case and screen protector.
Not a scratch they could find. I don't even take my phone off my desk. Kids actually nobody is allowed to even touch it.
At first I thought it was something I did. But as you research update problems you will see many issues from failing audio to failing displays.
The local small-time repair shop service guys will say we can fix it. But they pull a con. They just reball the audio IC and hit it up with heat. There is a chance that it will start working but the repair will not last.
Last option is to put the chips on Ali express and replace them yourself. Which is what I will do if Samsung Shafts me.
I have e-mailed the Service head of Samsung to resolve the problem.
My logic is that a flag ship should last 2 years at least.
If they shaft me on this Samsung have lost a loyal customer from Note 4 days.
You could get lucky doing things like cleaning the ear phones, the cache etc.
wahab96 said:
Anyways time to admit the hard truth it is a hardware issue and I think won't get it repaired, Abdul Wahab.
Click to expand...
Click to collapse
Are you saying you fixed it or you do not plan to fix it. Was the issue ?.

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