Anyone with a Circus Charlie PCB no what is causing this?

dj dns

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Anyone with a Circus Charlie PCB no what is causing this?

The PCB plays, but I have no background graphics.
 

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My recommendation is to give it to Modessitt to fix it. And keep it. :)
 
yup. That was the first thing I did. I was getting any sound at first and then I unplugged the ribbon cable and plugged it back and got sound. After that I reseated ll the chips and got no change.
 
yup. That was the first thing I did. I was getting any sound at first and then I unplugged the ribbon cable and plugged it back and got sound. After that I reseated ll the chips and got no change.

Seems to me that the background graphic eproms are missing or not available on the bus. Are any any empty sockets side by side on the lower board? Could also be missing ram or a fault decoder.
 
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