This is the 2nd Space Duel board I had that palys blind. Is there a certain chip/rom I can look to swap or change that might fix it so graphics are displayed or is it more than just a chip/rom?
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Check both X & Y outputs, if neither are there check the +/- 15V regulators, if both are good I would next swap the 136179 custom chip with a known good one, all the graphics go through it.
Dick
Not to stir the pot too much here, but the MC1495s often fail as well.
While he's checking those things, can anyone point to instructions for hooking up a scope to the pcb to see the actual output of the game? Details are good
Thanks