#%&#(!@ amp...

Check this out, last night my amp starts cuttin in and out...why I don't know. So I take a look at it and all seems to be fine except that the screws that mount it came out and the amp slid around. So when I go to put the screws back in, they spark as they touch the metal on the amp. Now to me that sounds like a ground problem. So I cut all power to the amp, put the screws in and still nothin. I checked all wires incl ground and speaker, but the amp still won't come on or nothing (no red light). What other trouble shootin ideas are there for this problem?