I grabbed a cheap deal on an mpulse 600.. I had to.. I might not use this live.. but.. the amp powers on.. but there is no output.. I get nothing lit from the right toggle switch... the solid state side.. the left, tube side's light lights.. I can hear the fan on also. I could hear something rolling around within the amp.. I unscrewed the cover.. I found a fuse unseated.. there are two internal fuses.. a left and right one.. Do you guys think I have a problem with the main, outer fuse? How do I replace this? the prongs are EXTREMELY loose inside the amp, barely able to clasp the fuse that was rolling around.. very cheap.. thoughts appreciated. Is this a cheap head? should I dump this now.. lol.. I got a good deal on it. I seated the internal fuse back in place.. did nothing.