HP-10 disassembly/reassembly

[[kby]]

Tony,
From your answer (and further assuming what I asked about in the previous reply), there are some pinout issues on the CPU. The line in question (line 4 from the keyboard) actually connects to pin 36 of the CPU, not pin 37. I took (hopefully) good photos of both sides of the board so I can figure out what else is off.

Sadly, reflowing the solder (again) and trying to scrub out under the chip near that pin didn't help (which is not a surprise, but one could hope). My guess is the pin is disconnected inside the DIP package.-kby