Hi Again, While I'm still struggling with the powers supply in the /84, I decided to also take a good look at the /05. Amazingly, the power supplies on this one (1972) are 13 years older than those on the /84 (1985), yet their outputs look absolutely perfect. Plugged in the cards, and it seems to work, apart from one annoying little thing: one of the front panel switches is bad. I noticed it when I was depositing, then reading back some data, then took a multimeter to determine that it's the switch itself that's broken. Cosmetically it looks ok, but it doesn't work. It's just one of the address/data switches, all other switches work fine. Are there any replacements for these switches to be found? Camiel.