I have a Mustang II amp that I picked up. It does nothing when I turn it on. No lights, no pop , no sound, no action at all. I'm not finding a fuse anywhere. The switch seems to be good. I would suspect the problem would be on the power board somewhere, maybe the transformer. Anyone know where I could get a new board for this? Or how to go about troubleshooting it? If I can't find a new board, or isolate and replace the problem components, I may have to convert this cabinet to a tube amp, but I would rather fix it if possible at a reasonable expense. Thanks for any suggestions.