P9 EVA-L09 No voice call mic function after screen replacement - GSM-Forum

Hattiwatti · 02-01-2018, 20:54

Hi,

I replaced a screen to a P9 and everything else works fine but the main voice call microphone. Even the secondary mic on top of the phone is fine.

Anyone else have had this issue?

The phone chassis was badly damaged and had to change that also.

I have tried to:
- 2 different spare part mic/usb daughterboards
- different motherboard to mic/usb board flex-cable
- factory reset

I could not test the mic funtionality when the phone came in as the screen did not work.

There is ground pins on the mic/usb board that connect to the chassis golded plates and maybe they are not getting connected and that would be the issue? Sorry just a starting repair guy with limited knowledge.

Any help would be much apreciated.

Thanks!

Hattiwatti · 02-02-2018, 08:42

Sorry, posted this to the wrong sub-forum...

Admins can delete this and I will post it in the hardware forum.

02-01-2018, 20:54	#1 (permalink)
Hattiwatti Junior Member Join Date: Nov 2017 Posts: 3 Member: 2774971 Status: Offline Thanks Meter: 0	P9 EVA-L09 No voice call mic function after screen replacement Hi, I replaced a screen to a P9 and everything else works fine but the main voice call microphone. Even the secondary mic on top of the phone is fine. Anyone else have had this issue? The phone chassis was badly damaged and had to change that also. I have tried to: - 2 different spare part mic/usb daughterboards - different motherboard to mic/usb board flex-cable - factory reset I could not test the mic funtionality when the phone came in as the screen did not work. There is ground pins on the mic/usb board that connect to the chassis golded plates and maybe they are not getting connected and that would be the issue? Sorry just a starting repair guy with limited knowledge. Any help would be much apreciated. Thanks!

02-02-2018, 08:42	#2 (permalink)
Hattiwatti Junior Member Join Date: Nov 2017 Posts: 3 Member: 2774971 Status: Offline Thanks Meter: 0	Sorry, posted this to the wrong sub-forum... Admins can delete this and I will post it in the hardware forum.