Level42
New member
Got a Centipede board that gives 3 beeps in test-mode. The lower half of the screen gives a lot of H-es, fire bullets are wrong but I can start a game and play. Sound is fine.
3 beeps indicates bad RAM 2101 at K7. Socketed and replaced it, still same problem.
Tried a 2nd 2101 still same problem.
Tried swapping the Pokey with my known good one, still same problem.
Any ideas ? Mux ?
3 beeps indicates bad RAM 2101 at K7. Socketed and replaced it, still same problem.
Tried a 2nd 2101 still same problem.
Tried swapping the Pokey with my known good one, still same problem.
Any ideas ? Mux ?
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