Have had this motherboard kicking around for years now, had no idea if it worked or not. The tab on the side of the socket to lock the arm is broken, but that doesn't seem to be a big deal.

I ordered a Pentium 233 MMX from the Ukraine for $20 (so I'm not out much if that's the culprit) to try with this board and it wouldn't post. Fans turn on, stuff gets warm (CPU and video card) but nothing on the screen.

I took it all apart, washed the board, got everything nice and clean and put it back together. No improvement. Now, I DID screw up and left the CPU voltage at 3.2V initially, but that shouldn't have cooked the CPU.

The old relic I picked up yesterday has a Pentium 75 in it, so I pulled that, slapped it in this board, and away it went, no problem. SO, I know with a known-good 3.3V non-dual voltage CPU, the board works.

So, I've ordered another Socket 7 board:
https://theretroweb.com/motherboards/s/pcpart … 5-8806-xx#chips

to test the CPU in.

Any other ideas while I wait on the new board? Only other board I have is the Socket 5 one in that old beast I picked up yesterday, which is a BIOSTAR MB-8500UUR-A V2.