Arrrrrrrggggggg!!!!!
Today, I had my Cyclone powered up, I wasn't paying too much attention to it, but I heard several chimes, as though it was rebooting then, BAM! Everything went dark except for G.I. No display, no MPU test lights, no sound, nada. Should I assume power supply? I'm fairly unfamiliar with SS. How do you check voltage on the power supplies? If the machine sits, turned off for a while and I turn it back on, the knocker fires once, the +5v LED lights and then goes back out. All fuses check out good.
Thanks.

Um, use a multimeter where?

OK, Here are my readings. 3J5-4 and 3J5-3 are correct. 3J5-6 is only .65VDC, 3J6-2 is -43VDC, While all of the 5VDC pins on 3J6 read 1.3VDC.

Sounds like a pretty sick power supply. Any thoughts on what to look at?

thanks,

I was going to buy a replacement board, but would rather not spend the bucks

Mine is doing, or rather not doing much more than rebooting. It doesn't boot at all, no CPU LEDs, no displays.....