Amaze 4G mic problem
My Amaze 4G for T-Mobile was rooted with s-on and flashed with Revolution HD 4.0 about half year ago. I had to change the digitizer/LCD assembly because it went dark. That went rather smoothly. However, the mic stopped working after that. I can hear people but they can't hear me. I did re-flash with the same ROM after the repair since the phone was having some other issues I thought might be software related. Didn't test the mic before the flash though.
The symptoms and what I've done so far:
-- People can't hear me during call. Turning on speaker doesn't help. Using a headset with built-in mic works.
-- The voice recorder app can't record a thing. Tapping the phone doesn't record either, so it's not dirt blocking the hole. AndroSensor app shows no sound input.
-- I can record video WITH sound. This was actually done after I replaced the mic PCB. Does this mean the mic is OK or the phone has another mic?
-- Re-flashed and tried another ROM, same thing.
-- Flashed back to stock T-Mobile ICS ROM, no good.
-- Installed SoundAbout app, played around with it, i.e., the headset plug trick, still no dice.
Since I can record video with sound, I feel it's more like a software problem, unless there's a secondary mic used for video recording but not phone calls. The sound doesn't seem to be recorded through the mic hole at the bottom as blocking it with my finger doesn't reduce the volume. I'm thinking to try the stock Gingerbread ROM as a last resort.
Any input will be greatly appreciated.