CoreGrafX1 no image / not working

[deubeul]

This morning I RGB modded a CGX. I didn't try it first with an RCA cable.
I used an amp that was working yesterday on another CGX. I changed the C133 & C135 too. I tried with Csync and composite video.

But I don't think it's a video problem because:

-With Wataru/KC, I get a black screen but the music plays. But nothing happens next, normally the demo starts with music after few seconds if you don't touch the pad. Here nothing happens after the title music stops playing. With Raiden I have a white screen and no music starts if I push run.

-I get the same issue with an RCA cable (using composite video). This RCA cable works with an other CGX modded the exact same way.


I get 4,96V out of the voltage regulator: could the missing 0,04V be the source of the problem? Or could it be something else (6280, 6270, Hucard slot...)?

I didn't notice any crack in the PCB or any over-heating IC.

Thanks for your help guys