Malfunctioning In-Call Audio!!! Please help!

[Guest KumateiDragonX]

Greetings fellow believers... I have a Dash that I've been working on for my brother. It was bought off of eBay and everything works on it but the in-call speaker. If you place the phone on speakerphone, you can hear the other caller speaking. However, if you place the phone on the normal mode you can't hear anyone talking to you. It's quite the annoyance, seeing as how everything else works except the in-call audio! It used to run the T-Mobile WM6.0 ROM but I changed it to the HTC 1.33 ROM in hopes of correcting the dilemma. No cigar. Then I flashed Kavana's WM6.1 080408 ROM on it and the speaker still won't work. Any suggestions?

P.S. The phone is no longer under warranty, so I can't get a replacement phone. (I checked)

Is there any way to repair the speaker? I've searched for how-to videos on YouTube to no avail.