Fingerprint scanner stopped working, can't be found

[OnceAMatrixMan]

Suddenly the fingerprint scanner became less responsive the past few days. Then today it's just stopped working. Restarted, cleared fingerprints, restarted and system could not find scanner and bring it to support. Another restart and I was able to add fingerprints, but it still does not unlock the phone.

Any thoughts?

 

[OnceAMatrixMan]

I'm done with LG too. V10 dead. G7 thinq dying. DONE!

 

[das_webos_transformer]

Hey guys, I'm actually a Pro! I repair phones all day everyday and the G7 is my daily, my fingerprint scanner actually quit working and I replaced it, and it works totally fine now. I believe it is a manufacturing defect, but LG is a **** company and they don't own up to stuff like this. I love my G7, but I wish they handled things better. If you can send it in on warranty, otherwise replace the fingerprint scanner. Any local shop should be able to to do it 60-80, Mobile Defenders has OEM ones. Different colors work Fina as well. I have a pink ok on my blue boy. It's dope. Only real issue I've had, that and my battery is starting to get mediocre

 

[Issemann]

I'm in the same boat. A reboot does the trick, but it's sooo annoying. Wish LG would own up and fix it.

 

[bdasmith]

Only it's not an issue because of the millions of g7s that have no problems.....

I'm in the same boat. A reboot does the trick, but it's sooo annoying. Wish LG would own up and fix it.

No issue with fingerprint scanner....

 

[pmoral]

Excuse my bad english....

It happens to me sometimes but is due to some apps installed out of google play. In my case the solution is just to uninstall the app or the apps and then reboot the phone. It works for me in 100% of cases.

Some other cases i can just install them again and the fingerprint scanner is working with that app.

 

[Issemann]

Excuse my bad english....

It happens to me sometimes but is due to some apps installed out of google play. In my case the solution is just to uninstall the app or the apps and then reboot the phone. It works for me in 100% of cases.

Some other cases i can just install them again and the fingerprint scanner is working with that app.

Which apps gave you problems?

 

[pmoral]

Which apps gave you problems?

Always the cracked ones. Not all the cracked apps but NOT the apps from google play.

I meand that is like if the apps i donwload from that web sometimes block the fingerprint.

And most of the times is just inmediately.

I dont usually install those cracked apps but i download a few photo and video editing tools.

 

[OnceAMatrixMan]

Mine "fixed" itself after about a week. It may have been an app or an update. But it works fine again.

 

[Surf Excel]

Solution to fingerprint not responding | Dead | Suspected Hardware Issue

Suddenly the fingerprint scanner became less responsive the past few days. Then today it's just stopped working. Restarted, cleared fingerprints, restarted and system could not find scanner and bring it to support. Another restart and I was able to add fingerprints, but it still does not unlock the phone.

Any thoughts?

So, after lot of investigation, the problem is with the fingerprint's "activity". It just stops working which will cause it to not show up in the menu and more headaches around other apps relying on it.

The possible solution to this is:
Download activity launcher or any app that can extract the activities running in your phone.

1. find: 'FingerprintASM' and 'FingerprintAuthenticator' under 'all activities' from the drop-down menu on the top
2. Tap on each to run it.
3. Restart the device.

Thank me later once done. :good:

 

[OnceAMatrixMan]

Tried it a few times, but fingerprint only works about 75% of the time event after trying this. In fact it's getting worse. Maybe it's hardware...

 

[WYPIERDAALAAC]

Suddenly the fingerprint scanner became less responsive the past few days. Then today it's just stopped working. Restarted, cleared fingerprints, restarted and system could not find scanner and bring it to support. Another restart and I was able to add fingerprints, but it still does not unlock the phone.

Any thoughts?

I have very similar problem. Fingerprint works in random situation but many times it does not work. Looks like fingerprint ceases to be active.. maybe its firmware problem. LG probably do not care about it.. but I see many LG users haves this problem.

 

[Kaepernick]

I had an issue with mine when I first got it. The back plate had been removed and glued back on. It was slightly open on the top, which made the fingerprint sensor move away from the connection on the back of the phone. The sensor was mostly unresponsive until I sealed it back up. Not sure if this pertains to your problems, but I figured I'd share.

 

[voyageurs60]

For the Repair Pro!

Hey guys, I'm actually a Pro! I repair phones all day everyday and the G7 is my daily, my fingerprint scanner actually quit working and I replaced it, and it works totally fine now. I believe it is a manufacturing defect, but LG is a **** company and they don't own up to stuff like this. I love my G7, but I wish they handled things better. If you can send it in on warranty, otherwise replace the fingerprint scanner. Any local shop should be able to to do it 60-80, Mobile Defenders has OEM ones. Different colors work Fina as well. I have a pink ok on my blue boy. It's dope. Only real issue I've had, that and my battery is starting to get mediocre

Question for the repair guy! My G7 Thinq fingerprint scanner stopped working. I tried to add my fingerprints again with no luck. The phone "buzzes" when I touch the sensor and the screen displays "Place your finger on the center of the fingerprint sensor." Sometimes I get "Sensor needs to be cleaned"

Stepped through some other suggestions and did a "hard reset/wipe of the phone", no joy. Will replacing the fingerprint sensor would effect a repair? I would hate to go to the repair shop, pay for the replacement, and it still not work.

Thanks in advance

 

[Kowala]

One possible quick fix

I noticed in a tear-down video that the fingerprint sensor uses touch contacts for signal transmission (as opposed to being a plug-in contact). I pressed on the area about where it is located, just under the flash and IR, and now it works! If you've dropped your phone a few times it might cause this as the back is glued on and the contact area could pull away from the glue (just a theory). I think I will try to heat it up and press down on it some more for good measure.

Update:
This approach does get it working again but the effect is not long-lived. Tried it with heating but again it is not permanent. Alas.

 

[OpenMinded]

So, after lot of investigation, the problem is with the fingerprint's "activity". It just stops working which will cause it to not show up in the menu and more headaches around other apps relying on it.

The possible solution to this is:
Download activity launcher or any app that can extract the activities running in your phone.

1. find: 'FingerprintASM' and 'FingerprintAuthenticator' under 'all activities' from the drop-down menu on the top
2. Tap on each to run it.
3. Restart the device.

Thank me later once done. :good:

I don't have these activities in the Android 10 ROM. When I activate some others it throws an error that seems to indicate the hardware is missing.
It's newly ordered and it seems connected ok, same position as original, checked without cover too, just doesn't work. Perhaps incompatible hardware or faulty?

 

[hutame]

activity launcher did not work on my LG Q stylus plus !!!

 

[hutame]

So, after lot of investigation, the problem is with the fingerprint's "activity". It just stops working which will cause it to not show up in the menu and more headaches around other apps relying on it.

The possible solution to this is:
Download activity launcher or any app that can extract the activities running in your phone.

1. find: 'FingerprintASM' and 'FingerprintAuthenticator' under 'all activities' from the drop-down menu on the top
2. Tap on each to run it.
3. Restart the device.

Thank me later once done. :good:

activity launcher did not work on my LG Q stylus plus !!!

 

[OpenMinded]

I don't have these activities in the Android 10 ROM. When I activate some others it throws an error that seems to indicate the hardware is missing.
It's newly ordered and it seems connected ok, same position as original, checked without cover too, just doesn't work. Perhaps incompatible hardware or faulty?

It seems to appy to Android 9. 10 has some other processes.
Easiest is to look for Smart cleaning, then choose fingerprint.
It will show that the hardware is not being detected.
I tried everything to no avail.
I either got two broken sensors or another issue.
Seems the lower board might be suspect.
If anyone figures it out, please psot, so will I.

Thanks