I have just purchased a Behringer GM110 Vintager amp and I've played it a couple times now. Just a couple minutes ago I hooked up my guitar and turned it on to find I have my previous Metallica setting on the amp. I quickly turned off the amp...plugged the cord into my guitar and attempted to turn it back on to find that it won't. I figured it needed time so I gave it a good half hour before trying again. I pressed the ground button on the back to see if it needed to be electronically detached. I also unplugged the amp and picked it up and then put it back down just in case. The amp will still not turn on and I'm beginning to think I blew a fuse even though no sound came from the amp prior to it not turning on. Please help me.