might have a protected amp... Have you looked inside of it recently? If you do, do you notice any black or burned looking parts? That's a good sign it's blew up. If not, then it is probably the inputs. If either of these is the problem, the best solution (at least if you want to keep your amp) is to talk to Sergey at
http://www.kbaudio.com He is a really nice guy, and their prices are damn good to get quality work done.
