Yet another victim.

[Alpha Kodiak]

While it may not be the problem in this case, old RAM can cause some pretty strange problems, including sporadic (or even not-so-sporadic) failures to boot.

I just recently got an older system up and running that had given me grief for a long time. I replaced every piece of it, including the case and power supply, but didn't think to change the RAM. I had all kinds of odd problems, including frequent failures to boot. Then, I got smart and changed the RAM out, and it works like a champ.