No fingerprint scanner even after reset - LG G6 Questions and Answers

One day about a week ago the fingerprint scanner on my LG G6 just decided it didn't exist. No mention of it in settings. People recommended I should factory reset, so I did, "knowing" that would fix the issue.
Well the scanner still does not make an appearance in settings and I was not prompted to set it up after the reset.
Could this be a hardware failure? The button still works to sleep/wake the device.
Running out of ideas, MDW.

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Home button/Fingerprint scanner failure

Anyone else experiencing this issue? Multiple threads on the OP2 official forums. My home button has become completely unresponsive and fails the diagnostic test (run by *#808# in the dialer, then going to "fingerprint test" or "keypad test")
Reports of the issue on the other board seem to be focused on the non-US model. Anyone else in the US experiencing this issue?
Going to go through the RMA process with the phone but doesn't seem like that will be a fast process.
Yes same issue... Not sure how to fix
One of my friend got his OP2 in India, and Service Centers are asking for AT LEAST 3 weeks for fixing this issue.
Same issue here. Tried flashing all the OTAs with any combination available in the book (since in other threads, said this fixed it), no luck.
Had this happen to my OP2. Initially had sold it but had it returned to me because of the issue. When I got it back I was able to get it working.
Shortly after that it stopped working again. Manually flashed 2.1, cleared data and cache and powered it ought door awhile as I was going to return the.
Decided to power it back on and need with it and it was working fine. Been working fine for the past three days even after unlocking the bootloader, rooting and flashing 2.1.1.
Not sure what the issue was with mine but it's working fine now.
OP support wanted to do a remote session to flash 2.0.2 with a special partition file but since I've been on vacation I haven't gone through that with them. Might not now that it is working good.
Sent from my ONE A2005 using Tapatalk
same issue here. have a open ticket with One plus awaiting a resolution.
I had faced the same issue in my OPT as well...A small trick resolved the issue.. In diagnostic test mode ( *#808#) I have tried finger print test -> finger print quality test -> some menu in Chinese with button (in Chinese) -> pressed button and placed finger on scanner -> the screen shows some numeric values... Done few times... After that my phone home button and fingerprint started working.... Registered finger again and all fine...What a magic...
Precondition oxygen 2.2.1
Previous fingerprint registration deleted..
Not sure whether this method may work for all... But can make a try.... Bibin
Try hard reset. Press power button for 8 seconds and let it restart the phone. Scanner comes back to life. Usually it happens due to some app updating conflicting with sensor setting.

Fingerprint scanner not working

Hi, does anyone had issues with fingerprint scanner not working? I updated my software to the latest on A2017U with the October update. After half a day my fingerprint scanner stoped working completely. I tried to reregister it didn't work . I did a Factory reset still nothing its dead .
So its working now by itself, maybe moisture gets in there somehow thats the only thing i can think of. Thanks everyone.
I have issues with mine too, in the past to fix it I have gone into the finger prints settings and deleted all the ones that are there and then rebooted, then you have to setup your prints again. That seemed to do the trick for me.
http://www.androidauthority.com/problems-zte-axon-7-fix-716895/
I couldn't access the device with the fingerprint reader on the first start up after the update, and I also can't access it using the pattern, even though I'm sure I'm entering the right one. So it loos like I have to do a factory reset now
Ratedzelaya said:
I have issues with mine too, in the past to fix it I have gone into the finger prints settings and deleted all the ones that are there and then rebooted, then you have to setup your prints again. That seemed to do the trick for me.
http://www.androidauthority.com/problems-zte-axon-7-fix-716895/
Click to expand...
Click to collapse
This fixed my problem.

LG V20 Fingerprint Scanner is total BS...

So all of a sudden my fingerprint scanner stopped working after a recent software update. Now I don't know if it was merely a coincidence or it had something to do with it. I tried a lot of solutions like battery removal for 30 minutes, Resetting the device etc but nothing worked.
I finally performed a hard reset through recovery and it worked fine until I paired my phone with my car's BT. Then I added the car BT as a trusted device and THEN my fingerprint scanner bombed again. And now no matter what I do, it won't come back on and I am simply tired of doing a hard reset.
This is the only thing about this phone that is frustrating me a lot. Any solutions? Thanks!
I don't have a solution, but wow, that sucks! I never had an issue with mine in the 10-11 months I owned the V20.
Sent from my SM-N950U using Tapatalk
HD2FORNICK said:
So all of a sudden my fingerprint scanner stopped working after a recent software update. Now I don't know if it was merely a coincidence or it had something to do with it. I tried a lot of solutions like battery removal for 30 minutes, Resetting the device etc but nothing worked.
I finally performed a hard reset through recovery and it worked fine until I paired my phone with my car's BT. Then I added the car BT as a trusted device and THEN my fingerprint scanner bombed again. And now no matter what I do, it won't come back on and I am simply tired of doing a hard reset.
This is the only thing about this phone that is frustrating me a lot. Any solutions? Thanks!
Click to expand...
Click to collapse
Which variant is it ? model #
Sounds like you need to do a warranty exchange or change the fingerprint part yourself.
It is the Sprint version!
Fingerprint sensor
I'm having the same problem, right after an update. I tried resetting and factory reset. No luck, the setting has disappeared. I bought a new sensor and still no luck. If someone finds a fix please let me know. I think it is definitely a software issue.
dborsche said:
I'm having the same problem, right after an update. I tried resetting and factory reset. No luck, the setting has disappeared. I bought a new sensor and still no luck. If someone finds a fix please let me know. I think it is definitely a software issue.
Click to expand...
Click to collapse
I had this issue and this helped
https://forum.xda-developers.com/v20/how-to/guide-solution-to-fingerprint-sensor-t3745769
HD2FORNICK said:
So all of a sudden my fingerprint scanner stopped working after a recent software update. Now I don't know if it was merely a coincidence or it had something to do with it. I tried a lot of solutions like battery removal for 30 minutes, Resetting the device etc but nothing worked.
I finally performed a hard reset through recovery and it worked fine until I paired my phone with my car's BT. Then I added the car BT as a trusted device and THEN my fingerprint scanner bombed again. And now no matter what I do, it won't come back on and I am simply tired of doing a hard reset.
This is the only thing about this phone that is frustrating me a lot. Any solutions? Thanks!
Click to expand...
Click to collapse
If it's a software issue then try this-
Settings- Apps- Show system apps-fingerprintasm-storage- clear data- Restart
dborsche said:
I'm having the same problem, right after an update. I tried resetting and factory reset. No luck, the setting has disappeared. I bought a new sensor and still no luck. If someone finds a fix please let me know. I think it is definitely a software issue.
Click to expand...
Click to collapse
Having the same issue.
This is what happened to me:
– flashing the Oreo modem ? get fingerprint working but no network signal
– flashing the modem I dumped from Nougat ? network signal OK but no fingerprint
I thought there were ARB for modems...
Still browsing for solutions...

Somebody else having problems with their fingerprint reader?

Hi, first of all I apologise if this question has been asked but I don't know how to search just this place.
I'm using everything stock, no root, stock launcher.
I have my phone set up to ask for the password on reboot. I have my fingerprint reader set up to unlock my phone. I also have the fingerprint reader set up to wake the screen.
However under certain circumstances the fingerprint reader does not unlock the phone. The most reliable way to trigger this behavior is to plug the phone in to charge.
I exclusively lock the screen with the power button.
The fingerprint reader is still responsive and it still wakes the screen but there's no vibration feedback and it does not unlock. After I unlocked the phone with my password and lock it again the reader works again.
So what's going on here? How should I debug this?
After reboot it is normal to ask for password first time. Sometimes i have also seen this but when i unlock with pattern (my backup way) and lock again it works fine. I can not trace this to be related with charging or something else and it happens rarely but i have seen it also. Maybe a software bug.
Looking back to the days when i have LG V10 i remember that i had the same problem with fingerprint sensor not working sometimes. It was more frequently related to heat buildup as it was hot phone anyway.
I had the same problem these days, I think the fingerprint reader won't work if your hands are really cold.
Hmm I don't think my U Ultra is getting particularly hot and, no, my hands are certainly not very cold either. This behavior happens indoors.
It's just extra security plan and simple
Sometimes, not very often though, my fingerprint reader refuses to respond. Not even a misread where you get haptic feedback and not a lot else.
Just using the power button and entering my back up security (pattern in my case) and it comes back to life.
I don't particularly worry about it, but I suppose it's nice to see that it's not just me
Will see if the upgrade to 8.0 fixes it.
I met this problem.The solution was very interesting.I use Yandex.disk app.This problem did occur after the Yandex.disk app is update.I hard reset my phone.The problem was not in my phone.But I setup Yandex.Disk app the problem repeat occur.İf you installed Yandex.Disk, uninstall the application.if you don't use Yandex.Disk,The last apps update uninstall to try.
Good Lord I have so many apps installed though...
Then go to a full factory reset and see if it helps, thats the 1st thing you do when you have problem.
After a bit of experimentation this behavior seems to have stopped after I disabled/removed all Smart Lock Trusted Places -- a feature that is already known to be buggy.
I have it too, once a day it puts me to enter the password, its a security or a bug idk.
No more, no less, every time when its charging. I installed some 3rd party apps, its possible that they are to blame.
We will see when 8.o strikes and i will hard reset.
Garkan said:
I have it too, once a day it puts me to enter the password, its a security or a bug idk.
No more, no less, every time when its charging. I installed some 3rd party apps, its possible that they are to blame.
We will see when 8.o strikes and i will hard reset.
Click to expand...
Click to collapse
8 fixed this bug for me but i found more bugs in oreo so i am thinking to roll back to 7.0 and meet fingerprint sensor bug again because oreo problems are disgusting - car bluetooth does not works as it should - i can't read addressbook in my car head unit - it shows error. i found that is some bluetooth software parts was not included in 8.0 but successfully fixed in 8.1. and i'am pretty sure we will never receive 8.1 for u ultra.
in russian 4pda forum i found some reports (unconfirmed yet) that fingerprint bug disappeared. maybe somebody here can confirmed it?
No i have android 8 and issue still occurs sadly did not found a fix.
I've suddenly had this issue a couple of days ago a couple of times. I didn't do anything (except a couple of reboots) and it was fixed again.
Now after updating to Oreo and again using leedroids ROM, i didn't experience theissue again..
I talked to a htc representative and said to clear credentials from security/encryption and credentials seems to be a conflict in security certificates. For the moment it works.

[FIX] If your home button stopped working

Last week, I took my phone off the charger and noticed that the home button was not working. Did multiple reboots, clean wipes and also reinstalled the stock ROM, nothing worked. Did the *#808# fingerprint test and found that the figerprint sensor was not responding which led me to believe this could be a hardware issue. I did not have the time to go to the service center so I turned on the on-screen navigation bar and used it like this for a few days.
Today, I thought I'd try to sort this out one more time before I take it to the service center. The *#808# fingerprint test still showed the sensor not available. Rebooted the phone and turned the on-screen nav bar off. Lo and behold the home key started working. I do not know how this happened, I'm just glad that it did.
Just thought I'll post here so that if anyone has issues they could try this out and it might help someone.
Cheers.:good:
I got the same problem. My OP5 Home button(with fingerprint scanner) stopped working suddenly. It got stock android since purchase. I never tried to root it. It suddenly became unresponsive. Will try to use nav bar for few days. Im getting ghost touches as well. Any Help appreciated.
Hi. I have the same issue on my op3t, looking for idfeas.
finalmoksha said:
Last week, I took my phone off the charger and noticed that the home button was not working. Did multiple reboots, clean wipes and also reinstalled the stock ROM, nothing worked. Did the *#808# fingerprint test and found that the figerprint sensor was not responding which led me to believe this could be a hardware issue. I did not have the time to go to the service center so I turned on the on-screen navigation bar and used it like this for a few days.
Today, I thought I'd try to sort this out one more time before I take it to the service center. The *#808# fingerprint test still showed the sensor not available. Rebooted the phone and turned the on-screen nav bar off. Lo and behold the home key started working. I do not know how this happened, I'm just glad that it did.
Just thought I'll post here so that if anyone has issues they could try this out and it might help someone.
Cheers.:good:
Click to expand...
Click to collapse
Hi. I have the same issue on my op3t, Oxygeos Version 9.05. My home and recents buttons do not work but fingerprint works fine. I turned on the on-screen nav bar and the home and recents buttons don't work there as well. Turning it off didn't solve anything. Any idea? Thanks
Facing exactly the same issue after upgrade to 9.0.5. home and recent buttons are not working, but fingerprint is working fine. Did you resolve this issue by any chance? if yes, please let me know as well how it was resolved. thanks. -ramesh
Try doing a factory reset, but take a backup before doing that.
Sent from my OnePlus 3T using XDA Labs
I am also facing this issue. It started off with a boot loop into the recovery every time i try to start the phone. It stopped after i cleared cache from recovery, but the default launcher doesnt work properly, no notifications in my drawer, and many other issues. the hardware buttons are responding (it lights up when i tap on it) but the OS doesn't do anything with it. I have tried with switching to the soft keys and it behaves the same way as well. the fingerprint scanner and back button works so far.
i'm having this problem too Got a OP3T, i found out a bit of info, it has to do with the screen, i'm still facing this problem so im gonna buy a replacement screen and see how it goes, ive already replaced the earphone jack board that houses most the flex cable connections and i also replaced the speaker, home button, and the usb c flex cable to no avail. what i haven't tried was to replace the battery and the main/sub flex cable inside. i'd really like a fix for this.
go to Settings -> Apps -> All Apps (ie including System apps)
look for com.android.fingerprint... or com.oneplus.fingerprint...
"Force Stop" it. and go to its storage and "Clear Cache" , "Delete Data" .
Now restart the Phone.
Worked for me on OnePlus3T running OxygenOS 9.0.5.
Phone was also on charging through out the procedure .. I doubt if it would have any significance though.
Good Luck.
I could not force stop this app.
MY SOLUTION
this is what it worked for me with OP5
I deactivated fingerprint, reboot to recovery, wipe cache+dalvik, restart (without fingerprint anymore) and it seems to be working just fine again.
I have observed this issue too in my oneplus 3 with oxygen os 9.0.6 and also in previous releases. The only thing that works for me is just to reboot the phone.
cincauhangus said:
I am also facing this issue. It started off with a boot loop into the recovery every time i try to start the phone. It stopped after i cleared cache from recovery, but the default launcher doesnt work properly, no notifications in my drawer, and many other issues. the hardware buttons are responding (it lights up when i tap on it) but the OS doesn't do anything with it. I have tried with switching to the soft keys and it behaves the same way as well. the fingerprint scanner and back button works so far.
Click to expand...
Click to collapse
I am facing the exact same problem. Have tried all the other fixes/solutions mentioned in this thread except the 'Factory Reset'.
Please let me know what did you finally do to resolve it.
Thanks
Something new? I Have flash Havoc ROM, but problem still exist :/
back button and recent button does not work on mine.
I have to turn on screen navbar..
The home button was not working.. but it started working after i enabled onscreen navbar...
The phone went to frantic vibrate the first time it boot after flashing new rom..
the light can be seen on these 2 non functional h/w key during boot , but then it turn off, then the h/w back and recent key would not function..
I don't even know what happened to this phone...
Guess i'll keep using the onscreen navbar...

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