Chosen Solution
Hi after service, (they changed my screen to new one) Fingerrprint scanner doesnt work, i don’t have led notification and proximity sensor doesnt work too. Please tell me can you change proximity switch from motherboard?
Proximity sensor not working is probably due to the screen not being put on properly. Either there is too much gap between the glass and the front display housing frame itself or some adhesive is actually obstruction the proximity sensor. As for LED notification I think that is part of the headphone jack assembly if it’s next to that and they probably didn’t bother putting the notification LED plastic piece that focuses the LED with the white (opaque) plastic piece. Fingerprint scanner is on the power button right? If yes they probably damaged it because it sounds like they gave you a whole new screen with a frame. You should probably take it back to where you got it repaired from and talk to them about this.
Before disable any features or removing covers to acces screen or internal parts! I’ll try first heating the screen with an electronics heat gun, or a hair blow dryer with a back and forth motion along the frame and screen at the same time press in the corner. This is on right the opposite of headphones Jack’s is where the proximity sensor is located. use a napkin or a rag to press down the screen because the phone will be hot! The whole idea is to melt the black adhesive used to keep the screen together to the frame and bring the screen to its proper level. This is where the issue lies to the proximity sensor acting faulty Once phone is hot also face it down and use light pressure to the sourounding Edge! And keep the pressure till it cools down for about 3-4 min Do this on shut down device Turn on the phone and then do a test by dialing ##7378423## “Hit proximity switch” and should read off by default! Put a finger but don’t touch the screen, on the right corner and should turn on, remove finger, should turn off this indication it was successfully fix! Note this fix is the phone actually has the black adhesive used around the edge when your screen was previously replaced. Some technicians might of not used the black adhesive and used double sided tape to keep screen together. The double sided tape could also bring problems down the line because of dust particles getting in between the edge and adhesive not sticking on the screen and causing the screen to lift up from the frame In this case you would have dis assemble the whole phone to get to screen and clean around the edge and install proper adhesive and fallow the above steps! I did this and it help me, I hope it does it for you!
A messy workaround is double tap the power button when a call has come through (activates the camera), hit the home key (should bring up the home screen) then the Phone icon. I should give you the option to ‘Show keypad’, then the phone will operate irrespective of the proximity sensor. A bit fiddly, but it works for me.
