Seems like everytime I fire up one of these systems something fails. Guaranteed....

The latest is a working system put in storage for a couple months that now won't boot.....you get the happy Mac....Welcome to Macintosh screen and then nothing. Doesn't matter if I boot off a floppy or the hard drive. If I swap everything (logic board, memory, cache, hard drive) into another se/30 system it boots fine. I also tried replacing the power supply with a brand new one from Artmix and it does the same thing.

Ideas??? :'(