Thanks for the ideas. I had the same thing with Honor 9 Lite (these one) and your tips helped.The problem with my U11 started about 24 hours ago from now, after having the phone in the bathroom and having couple of water drops on it. The same happened many times before without any problem as the phone claims to be water resistant, so nothing unusual or new.
After this, I have noticed Fingerprint/Home button was not working and appeared to be pressed constantly with a "Cover the fingerprint scanner completely" message on the screen and was not responding to any touches.
I also had problem with charging as the scanner behaved as it was constantly touched triggering the screen on again and again and somehow interrupting charge process. Had to remove all fingerprints and disabled the unlock feature via fingerprint/home button touch.
Here's what I have tried:
- rebooting
- rebooting in safe mode
- removing all fingerprints and trying to re-add, but without luck (getting "try to cover the scanner completely" message in red as it was already covered)
- wiping the cache partition
- used hair dryer to dry out if there was some fluid inside
- soaking fingerprint sensor with drops of water
- washing the whole phone! (as U11 meant to be water resistant)
- and finally what helped was dropping isopropyl alcohol on scanner, rubbing and tapping it with a pad with for a minute or so
I have used several alcohol prep pads saturated with 70% isopropyl alcohol - squeezed it over the scanner and used the same button to rub and tap.
Best guess here is that some dirt particles or maybe drained fluid remainings were accumulated over/under the scanner that was causing the problem and alcohol cleaned it out.
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