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Author Topic: Twin Cobra issues  (Read 2029 times)
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jessiewonka
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« on: April 11, 2015, 03:58:57 pm »

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.


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jessiewonka
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« Reply #1 on: April 11, 2015, 04:13:47 pm »

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iankellogg
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« Reply #2 on: April 11, 2015, 07:05:15 pm »

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.
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jessiewonka
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« Reply #3 on: April 11, 2015, 07:08:13 pm »

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...
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iankellogg
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« Reply #4 on: April 11, 2015, 07:09:51 pm »

Yeah that makes sense. I am surprised it didn't have the ground. Pretty amazing you even got that much video without the ground.
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jessiewonka
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« Reply #5 on: April 11, 2015, 07:42:14 pm »

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