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Sega Frogger and GBS-8220 converter (CGA to VGA) problems

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I am doing a conversion job from a broken 19 inch CRT to a 19 inch LCD with the GBS-8220 converter board.

I have the wiring done and I don't get a picture out. The frogger board is recognized as it doesn't say "No Signal" but the picture is just black. I'm powering the board with 5.18 VDC and I was wondering if that was too much since I've had troubles in the past with the supplied voltage being the problem.

The monitor was originally hooked up via Horizontal and Vertical sync but none of the pinouts that I could find online had those on them so I just used the regular sync (which wasn't being used).

I have no idea where to approach the situation and I was looking for some ideas. Thanks guys if you can offer any kind of help.

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