A few months ago I sold off a Dean Edge Hammer to fund the purchase of my Jazz Bass. When I sold it, everything was working in top form. No problems whatsoever. I just got off the phone with him, and he's saying that for whatever reason the bass was not working. It's an active so I asked him if he had swapped out the battery and made sure it was in place correctly. I asked if he had used another cord, and tried it through another amp. Or if he had tried another bass through THAT amp. All of which was met with a "Yeah, man.": I don't have the bass here but I'll be picking it up and taking a look at it sometime in the days to come. So, any advice? Anyone had similar problems? When I'm doing my once over are there anythings I should be paying CLOSE attention to? Lame. Also, if I can't find anything what should I do? Obviously I'm not in the position to give him the money back but i'll feel like a douche for sticking him with a non-functioning instrument.