raybay, the OP said he just got hold of the machine, and the motherboard connections are off. OK, nobody's disputing that the motherboard could be bad Plus, we've already done 20 pages as to whether the PSU takes out the board, or vice versa..
But, unless the board is visibly burned, then fine, throw it away. Otherwise, wait until it's hooked to the system and doesn't work, before you start quoting statistics and telling people to buy another.
Everybody's right, nobody's wrong, it's just a question of sequence!
I beat the crap out of my 5026, no AC, all summer long, no quarter called, no quarter given. And NO, problems with the board. Maybe if it makes 5 years, I'll retire it with honor. If I don't, and it blows up after 5 years, I'll replace it. One thing you can make book on, I won't be pissing and moaning about suing. A nickle is plenty of good use, at least in my mind. I'll be satisfied at having gotten my money's worth.
If it blows up tomorrow, maybe I'll grumble a bit, but not all that much.