While installing a case mod, my USB won't work on my iPod touch 1G (won't charge, won't connect, etc.) I've got my iPod open again and I see three wires connecting to the USB part, and they all seem fine. I don't see any problems or anything really damaged looking except for some scratched up black tape looking stuff near the bottom of the big silver part below the battery housing. Anyone have any ideas what's causing this. Please help me, I don't want to have to buy a new iPod.