....SOLVED......I forgot to check that "new" PSU had a -5 volt line for the ISA slot, (KT7133a had one.) Motherboard is looking for -5 volts that is not there on the new PSU. Looking around the web, I see others have had the same problem. Hmmn,..what will the enthusiast do these days? Look for ancient PSUs? Guess I could solder a -5 V regulator somewhere, etc.