Twin Cobra issues

[jessiewonka]

I picked up a Twin Cobra pcb which boots, plays, has sound, but the image is very faint and flickery and kinda jacked. Prodded around but nothing yet.

[jessiewonka]

[iankellogg]

just to get the easy question out of the way. Is this monitor a known working monitor?


I think that might be ram. im really not sure though, that is pretty crazy looking.

[jessiewonka]

Over at the Shmups forum system11 offered: "This, I had one of those bootlegs and it doesn't have a video ground. Create a wire link from 14 to the ground plane similar to what someone did on mine."

This indeed cured it. But I may have made it worse as now player one stick only moves up/right, and player two anything gives a "tilt" message on the screen and resets the game. Eek...

[iankellogg]

Yeah that makes sense. I am surprised it didn't have the ground. Pretty amazing you even got that much video without the ground.

[jessiewonka]

Ok it's fixed, I used too heavy of a gauge wire and the connector wasn't seating all the way.