I have a variant of the issue reported by other users where some games will load but not play. I was hoping that someone might see a pattern in which work, and which don't, that might suggest which chip needs to be replaced (or other maintenance action).
These games work perfectly:
These games do not:
Raiders of the Lost Ark
They all load and display graphics / play music, and the game select/reset buttons on the unit work. However, for the games listed as not working, it's as if the joystick and button presses don't have any effect, and thus you can't play the game. The Joystick and button work fine on the other games.
I've cleaned all cartridge contacts repeatedly with alcohol, and I've opened up the box and joystick, cleaned them, and see nothing amiss.
Do you all see a pattern that would help diagnose what's wrong? Thanks!