Thanks for the reply.
How would one go about diagnosing and/or repairing a mainboard issue?
Also, I have done some more trouble-shooting.
First, I disassembled and cleaned the controller, so I doubt that the controller is the issue. In fact, it was in pretty great condition.
Second, I’ve tried a few more games – Panic Bomber and Mario Clash. By pressing ‘down’ on the right D-pad, both of these games will go past the startup screen, into the “4 corners” screen and past the autopause screen all the way into the game-specific intro animation, but still only accepts input from ‘down’ on the right D-pad (at most, this allows me to reset the intro).
Again, any help is appreciated; thanks!
