Really people need to read before they post....
His CPU board has been repaired. The EPROMs have been replaced and I'm sure they were seated correctly because the board was shipped back 100% functional....hopefully Cauldron people aren't lying.
There could however be a problem with the DC power supply for the CPU boards if it's frying EPROMs, CPUs, and RAM. That would be the next thing to check with a multimeter.
Until I can scan the manual that would be the first thing that would pop up in my head given the situation.