I'd repost your questions about recording software in that forum. I think there's one; I don't get out of this one too often.
Honestly, if it's a warranty issue, you're better off letting them handle it while it's still covered even if it's an easy fix and you can do it yourself. Once you stick your hand in there, you void your warranty in most cases. Worst case scenario; your input jact has a cold solder joint and that's what's keeping your guitar from sending a signal. Easy fix; just resolder the wire on the jack terminal. But, let's say in doing that, in some minor way you've left evidence that you made the repair. Now fast forward 2 months and you're guitar stops working again. This time it's a switch and a pot that have gone bad. You want the warranty to cover the repair, but when they spot your work they'll say you can't prove your work didn't cause the switch and the pot to go bad so they won't do it. It's stupid but companies do that all the time and to a certain extent they have too.
If you're confident on soldering and trouble shooting and don't care about the warranty, then pop open the control cover and work backwards from the jack checking every connection.
