Posted By
TLC
on 2021-07-19
16:35:39
|  Re: Commodore 16: Black and white screen on Composite, color on the RF
@RetroShire not happy to hear that... :-/ At least, the RF modulator can be ruled out completely. What I'd do in this case, is something what BSZ has already suggested. Take the motherboard plus a continuity tester, and do a static verification of the AV (DIN8) socket's area against the schematics. I'd check whether the connections were really there, and also, whether there were any unintentional shorts. (Thinking it over, supposed that this machine is a recent "find", there's a chance that it never in its life was used together with a monitor, but TV sets only. That is, the AV color problem might have gone unnoticed in its whole life ie. it can potentially be there from production). Also, finally I'd take a DIN-8 plug, strip it, connect the "plug" part to the AV socket, and check whether all pins had good contacts to the socket pins (--> continuity between pins and the socket's solder pads, and also any potential shorts). Other than that, I'm clueless.
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