Recently, the USB audio input stopped working on my E17. Windows still detects it, and as far as it knows, there's still sound going, but there's no sound coming out. I tested the other inputs, and they work fine, but the USB input doesn't. I'd just use optical, but my computer doesn't have that...

I really want to remove the memory wire in my M6, as it's causing the earphones do not fit the best they can. However, I'm rather short on money (saving up to get my Nexus 7's screen repaired) and do, so I would appreciate a bit of a guide on how to do this so that I'm not running in blind. I...