Sega G80 custom question

hatster

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Hi,

Before i spent countless hours on this unknown boardset does anyone know how to tell if the custom chip on the CPU board is good ? ie: will it still do the diagnostics even if its bad ?
at the moment, i get nothing, no light on the cpu board on powerup, the test button doesnt appear to do anything. There is life on all the address lines, and the eprom / cpu / ram are all good.

thanks !
 
Are you talking about the security chip 315-00xx? I dont think ive ever seen one go bad. Mismatch of course will cause a problem.
 
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