Some Altair questions, if I may..

In any event, once the data LEDs were acting "normal", I went ahead and plugged-in the CPU board and tried it out. It was running at about 100V of line when I noticed that something in there was now pulling about 350mA.. almost 35W! Without the CPU board, current was almost nil.. Then I caught a slight whiff of "that" smell, and switched-off, to hunt down the hot component.. which seems to be on the D/C board, not the CPU board. The D/C had a fire in the past, but I did replace the associated chip & damaged components. Maybe I missed a shorted cap or something, but how would the insertion of the CPU board create a new, high-current path to the D/C board? And that's when I packed it in for the day. If you had seen the state of this thing when I got it, it's almost like a miracle that it's doing anything at all right, lol. A genuine basket case, it was.