<I watched them swap memory, power supply, motherboard, hard disk controll <and such for an hour. LN01 training, I goosed the trainer that I could create a fault he couldn't find in excange for one. I found mine in and he was still going later. the bug, lead pulled off the fuse holder in the main PSU. I earned my keep fixing commercial VHF and UHF radios which from call to call could be dynamotor and tubes or the lastest IC and solid state usually no prints and under time pressure. It paid for college. FYI I was at DEC from 83->93 CSSE ML0 Printing systems along with Pattenden, Howard, Preece and Paul Nelsons merry crew. Allison