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Update to Android 10 "Q" - Battery reads 0%, cannot charge and rebooting

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Tweetytek

Senior Member
Oct 19, 2014
62
56
Well, there's a lot of info across the web on Android 10 charging problems, and many forums reporting the issue. I decided to come to XDAF as this is the THE site for tech solutions.

I am running Android 9, and upgraded using the Samsung "new software update available" notifcation. Battery was 80% and on charge. I started the update and when completed, after about 5 mins, I was presented with:-
* A battery reporting 0%
* "connect charger" message on lockscreen
* Does not charge , usual sound when connecting a charger does not occur.
* After about 10 seconds after UI is ready, the phone just reboots. This cycle is repeated.
* The phone cannot be powered off to try a charge then.
* Tried soft reset, hard reset, factory reset, cache wipe .- using recovery mode - nada, nothing improves the situation.
* Tried OEM charger plug - although I do not have an OEM USB-C lead. - no effect.

I note across the www advice to check hardware port, clean it, blah blag but the thing is, my equipment worked fine on Pie (9). So, I downloaded Pie9 firmware from sammobile, downloaded Odin, USB drivers etc and flashed version 9 using standard "CSC" not "HOME_CSC" file to force a factory reset. Rebooted phone and voila all is fine again. I then repeated this process but using the latest "Q" (Android 10) from sammobile and presto, same problems as before. I repeated this cycle another TWO times with the same results. Android 9 = fine, Android 10=battery/charge issues and constant reboots after power on + UI ready.

Conclusively then, there IS a problem with Android 10. It could well be that Samsung are trying to force users to use OEM charger plug and OEM cable - I dont know but I have ordered a OEM USB-C cable from Samsung. But either way, there's a definite problem with "Q" and not just my device.

Can anyone add/.support the view and has anyone managed to resolve via using OEM charger and cable?
 

DiscoBear

New member
Aug 28, 2007
2
0
Hi,
The only fix for this problem is to change the charging pcb for a SUB_04. Mostly there is a SUB_03A pcb in it.
There a a few differences on the pcb boards. I think samsung is forgot to write some lines to the IC on the SUB_03A pcb.

otherwise you can downgrade back to Pie. Boatloader is the same as Q

best regards
 
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NVTesla

Member
May 27, 2018
16
4
Hi,
The only fix for this problem is to change the charging pcb for a SUB_04. Mostly there is a SUB_03A pcb in it.
There a a few differences on the pcb boards. I think samsung is forgot to write some lines to the IC on the SUB_03A pcb.

otherwise you can downgrade back to Pie. Boatloader is the same as Q

best regards

Thank you for this very precious information. Do you happen to know whether this issue is present on the A50 as well? I suspect it is the case (although it does not seem to be bricking phones), I made a very detailed post about it on reddit but not many people seem to care.
To sum it up, there is an issue that is affecting some Galaxy A50 smartphones and it causes a lot of very annoying issues (all related to USB / Charging). It would be awesome if you could provide us with a little bit more information about this charging PCB issue.
Thank you kindly.
 

DiscoBear

New member
Aug 28, 2007
2
0
Most of the A50 Phones have issues with the pcb connector on the mainboard. The solderpoints on de left side will break fast when you pull off the mainflex cable.

Tomorrow or saturday I will check if there are several revisions charging PCB's. I let you know.


Thank you for this very precious information. Do you happen to know whether this issue is present on the A50 as well? I suspect it is the case (although it does not seem to be bricking phones), I made a very detailed post about it reddit but not many people seem to care.
To sum it up, there is an issue that is affecting some Galaxy A50 smartphones and it causes a lot of very annoying issues (all related to USB / Charging). It would be awesome if you could provide us with a little bit more information about this charging PCB issue.
Thank you kindly.
 

Tweetytek

Senior Member
Oct 19, 2014
62
56
I got it stable, eventually, although it was a right PITA. Factory reset to 9, wipe cache, reboot, install via ODIN, wipe cache, factory reset, wipe cache.
Normal everyday user though, the "upgrade to Q" if frought
Although I would say, it doesnt need a PCB fix !!!! :)
 

fizzingbees

Senior Member
Feb 12, 2014
575
110
Peshawar
I got it stable, eventually, although it was a right PITA. Factory reset to 9, wipe cache, reboot, install via ODIN, wipe cache, factory reset, wipe cache.
Normal everyday user though, the "upgrade to Q" if frought
Although I would say, it doesnt need a PCB fix !!!! :)
That right
Roll back to android 9

Android 10 update is buggy and Samsung recalled it.
You can no longer get OTA or see it on samfirmware website or on samfirm windows app
 

geke4711

New member
Jul 13, 2019
1
0
identify charging PCB

Hi,
Does anybody know how to identify if an A70 contains that old charging PCB which makes this problem without opening it (by software) ?

-> I would like to know this before flashing Android 10.
 

n20661

Senior Member
Oct 2, 2017
80
27
identify charging PCB

Hi,
Does anybody know how to identify if an A70 contains that old charging PCB which makes this problem without opening it (by software) ?

-> I would like to know this before flashing Android 10.
Install a device info app (there are many out there) they can list your motherboard and PCB boards info as well. e.g: Device info HW from play store.
 

noni2724

Member
Aug 13, 2012
14
2
my phone stopped charging because of same issue after update. i went to samsung service center as it was not charging so i cudnt do anything. they replaced the charging card to SM-A705FN_SUB04(my phone model next to serial number written is sm-a707f/dsm) but the problem still persists. and now i have android 10. i managed to get a " Buyyart New Professional Power Battery Activation Charge Board with Micro USB Cable Circuit Tester " from which i can now charge it after taking out battery so i dont have to take it to service center for trying any fix. but still its a lot of work. can anyone please guide what to do? as whenever i try to flash stock rom it says binary fail bootloader cant be downgraded.
 

noni2724

Member
Aug 13, 2012
14
2
update: i tried to flash stock recovery to remove magisk and it doesnt work. so i think the problem is not with magisk. prblm is with update.
 
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