I've been working on a coco 1 and i have it mostly working, booting, etc.
some keys including ENTER and a few keys around it did not work (I will inventory which specific keys do not work tomorrow). I disassembled they keyboard and cleaned the keys and pads with vinegar and gently cleaned the circuit board. Reassembled, same problem.
Continuity between the ribbon cable and the PCB on the mobo side seems fine.
any other diagnostics or ideas?
some keys including ENTER and a few keys around it did not work (I will inventory which specific keys do not work tomorrow). I disassembled they keyboard and cleaned the keys and pads with vinegar and gently cleaned the circuit board. Reassembled, same problem.
Continuity between the ribbon cable and the PCB on the mobo side seems fine.
any other diagnostics or ideas?