iPhone internal ear piece problem

[Horrific_Ending]

Ok long story short my g/f dropped here iPhone in water and killed the screen. Everything worked except for the LCD so I took the phone apart since the warranty was already void and replaced the LCD. Now when I first fired it up after fixing the LCD the back light wouldn't come on so I guess I tricked the sensor by putting my thumb over it and kept switching auto brightness on and off and it fixed the backlight issue. But now the internal headpiece doesn't work and I can't hear people on phone calls. I can hear them on headphones and speakerphone just not on the reg headpiece. And this worked before I replaced the LCD because we tried it. And this isn't the headphone glitch cuz when I turn the volume up it says ringer not headphone ringer. Anyone know what could of happen? Or know what part of the internals control this? Maybe connector 3 inside went bad? Plus when I do place a call the LCD doesn't dim so I think it's the sensor and doesn't connector 3 on the inside control the sensor and maybe the headpiece? Sorry for being so long but I want to fix this problem and want to give all the background.

[ReyZero]

Not to sound like a tard but have you popped it back open to make sure the connector is on correctly and not severed in anyway? Could be possible it was tugged and lost it's connection to a board. Problem seems to be more hardware related then software.
Was the earpiece ever working after the water drop?

[Horrific_Ending]

yeah i opened it many times to see if it was alright. I am thinking it was a hardware problem too. I am thinking its the tab labeled 3. I think that controls the proximity sensor? but yes it did work after it was dropped in the water because we called the phone and we could hear out of it. but does the proximity sensor control the ear piece? because i do notice that when i make a call and put it up to my ear it does not dim or anything. so maybe its the proximity sensor that is messed up disabling the ear piece?