Captain Commando Repair Logs
C board was bad. Replaced with a compatible C board with a CPS-B-21 chip from a Street Fighter II game.
Unit has a suicide battery on it. Modified the C board then reprogrammed the 22 and 23 EPROMs with suicide free code. Tested the game.
Performed suicide fix on C board and reprogrammed the 22 and 23 ROMs. Replaced a missing graphics ROM in socket 1. Tested board and found the game had corrupt graphics. 2 data lines on ROMs in sockets 1, 2, 5, and 6 were stuck low. Traced the problem back to a bad chip on the C board. Modified the C board from a Street Fighter II game that had the same chip (CPS-B-21) and installed it to fix the graphics problem. Tested board.