HP-10 disassembly/reassembly

[[kby]]

Excellent summary. I think I actually checked through the connector between the CPU to keyboard connector. Can’t remember for sure if I did cpu pin to cpu pin, but that would’ve been the obvious. This was done by mating the cpu board to the keyboard but not attaching that assembly to the power supply/printer, thereby allowing me to check from the bottom side of the cpu board. That might not be exactly positioned as it is when the whole thing is together, but if that were the issue I would expect I could make it intermittent by slightly moving the case pieces around,which doesn’t help. I have also tried cleaning out the connector holes and pins.

Of course it is always possible I measured something wrong or was on drugs when I was aiming the meter probes…-kby

P.s. I’ve experienced the fragility of the pins multiple times. For now I have adequate spares, but it is something I don’t relish dealing with.