HP-67 - 1705S02263 - Full Repair Advice Requested (was HP-67 - strange behavior)

[albertofenini]

Hi Andi,
no we didn't, this is how looks the display (this is supposed to be 0.00) when a good working CPU is loaded

The segments not working are C and F, which are driven by the RCA chip and not by the transistors.
Looking at the schematics, the four transistors (three on the back and one in front) should drive
the G segment, which in this case works, look at the next picture which is supposed to be a list of 8

Will replace the RCA and see what happens, still we need to repair this logic board.