I apologize for the vagueness of this post but this has only happened once or twice in the past week. I have an old GBE Series 2 running into a 2x10 and 1x15 (both Genz Benz) and I was wondering if any of you knew what could cause the amplifier to shut itself down without warning. I played for 2 minutes and the thing just shut down, all lights off, no temp warning, nothing. I wiggled the power socket in the rear power cord receptacle (which has a little bit of free play) and the amp came back on for a second then shut off again. I turned the switch off and on and it would stay on for 10 seconds. Then, I pulled the fuse, saw it was intact, and reinserted it firmly. Since then it hasnt shut off again (even if I wiggle the power cord) but Im worried since it was so mysterious.