I just recently bought this locally and I haven't been able to use it at all. I got it home and I can't figure out how to use it at all. I've gone through everything on this forum that it could possibly be. I restored everything to factory preset, reflash and firmware and still no luck. After spending over 6 hours trying to figure it out, I held the tuner button to see if it was even receiving any signal from my guitar at all and (of course) it wasn't. PLEASE HELP!!!! I checked all of the inputs and outputs to see if any of them were muted, and I don't think either one of those are the problem, but I've never messed with any equipment like this so I could be wrong.