I vaguely remember a few posts about that issue somewhere back in this thread. I assume you've tried draining the cmos and juggling around the ram. I also remember some posts where people tried to upgrade memory, and then the board wouldn't boot until they only booted with a single ram stick installed, and then after that boot they could install the other stick. Did you try to see if even the boot block (bios recovery mode) would boot? Although it is probably not a bios issue, it does sound like a hardware problem. Sounds like something in the power circuit. Caps can also go bad by simply drying out with no change in appearance.
yep, going back there were several people with this problem. I tried clearing cmos, battery, power supply, 5 kinds of ram in the first slot, hooking a floppy to it for recovery mode, changing the cpu, and tried booting with a PCI and and a PCI Express video card installed.
I even reflashed the bios using my other FID (hotswap flash).
The board is totally recapped with rubycon caps, it made no difference.
I agree, it's probably a regulator or something dumb making it dead...