Dirt you might be right It might be a very early Tac50 or late TIV
It’s in a grey Tac 50 cabinet but I noticed the Dsp did say Dover on the board. Also we checked all the Pico fuses on the ssl they were all good. Best I can figure is there is something in the card rack shorted drawing the supply down. We did find if we leave the +12 unhooked and connect the -12 side of the supply we could get the cpu to come up. I think the cpu only uses the 5volt supply like you said so this doesn’t make a whole lot of sense?
