Strange iPhone 5 Bottom Mic Problem - GSM-Forum

irepairsav · 11-03-2013, 17:38

Long time reader, first time poster...

I have run into a very strange problem with an iPhone 5. After a screen replacement, the bottom microphone stopped working (no one can hear me on regular calls and voice recorder picks up nothing) . I suspected a loose connection or dock flex. Well after trying 4 different dock flexes I still have the same problem. I have tried resetting all settings, and even a full DFU restore. I have even pulled the logic board, hooked up a fresh dock connector and power flex, No dice.

I have checked the connector under a microscope and it looks perfect (no missing / damaged pins or traces). Whats really odd, I can short a couple of pins on the logic board dock connector port and get static in voice recorder. Also, the microphone on the earpods will work.

Anyone have any ideas on this one? I'm stumped.

PS ... I own a repair shop in Savannah, GA and work on iDevices and Samsung phones everyday. I will do my best to contribute back.

irepairsav · 11-04-2013, 03:52

Any ideas anyone? I've ruled out liquid damage as well.

AndreyPkr · 11-04-2013, 21:05

check closely around Charging Unit conector on mother board. and look with a microscop for damaged component aroud screws, maybe you damaged someting when you unscrewed the screws. take a pic and post it

ray888 · 08-21-2014, 15:03

Hi there, did you ever find out the problem, have exactly the same issue here with a 5, screen replacement, now no bottom mic, everything else working perfectly, but its really really frustrating!! :/ cheers any help/advice would be HUGELY appreciated!

11-03-2013, 17:38	#1 (permalink)
irepairsav Junior Member Join Date: Nov 2013 Posts: 4 Member: 2058693 Status: Offline Thanks Meter: 0	Strange iPhone 5 Bottom Mic Problem Long time reader, first time poster... I have run into a very strange problem with an iPhone 5. After a screen replacement, the bottom microphone stopped working (no one can hear me on regular calls and voice recorder picks up nothing) . I suspected a loose connection or dock flex. Well after trying 4 different dock flexes I still have the same problem. I have tried resetting all settings, and even a full DFU restore. I have even pulled the logic board, hooked up a fresh dock connector and power flex, No dice. I have checked the connector under a microscope and it looks perfect (no missing / damaged pins or traces). Whats really odd, I can short a couple of pins on the logic board dock connector port and get static in voice recorder. Also, the microphone on the earpods will work. Anyone have any ideas on this one? I'm stumped. PS ... I own a repair shop in Savannah, GA and work on iDevices and Samsung phones everyday. I will do my best to contribute back.

11-04-2013, 03:52	#2 (permalink)
irepairsav Junior Member Join Date: Nov 2013 Posts: 4 Member: 2058693 Status: Offline Thanks Meter: 0	Any ideas anyone? I've ruled out liquid damage as well.

11-04-2013, 21:05	#3 (permalink)
AndreyPkr Freak Poster Join Date: Oct 2012 Location: London, UK Age: 34 Posts: 121 Member: 1819464 Status: Offline Thanks Meter: 88	check closely around Charging Unit conector on mother board. and look with a microscop for damaged component aroud screws, maybe you damaged someting when you unscrewed the screws. take a pic and post it

08-21-2014, 15:03	#4 (permalink)
ray888 Junior Member Join Date: Aug 2014 Posts: 2 Member: 2244161 Status: Offline Thanks Meter: 0	Hi there, did you ever find out the problem, have exactly the same issue here with a 5, screen replacement, now no bottom mic, everything else working perfectly, but its really really frustrating!! :/ cheers any help/advice would be HUGELY appreciated!