Shadow Dancer display problem

rugal.b

n00b
Joined
Feb 20, 2004
Posts
16
I have a Shadow Dancer PCB that is currently running on my Supergun (so its outputting to my CRT TV rather than a monitor) and I am having real problems with getting any picture at all with it.

When I power it on I can hear all the sounds and music correctly, and all the game will play but with no picture on the TV.

Now the weird thing is, the game will sometimes display correctly, and when it does it will be perfect until I power it off again (then I am back to square 1). It seems rather random when it does work, as I move the board a small fraction and then the picture springs to life (there doesn't seem to be a concrete way of getting this to work).

Out of interest I also plugged the supergun into my HDTV to see if I got any image out of that, and I did, but it would constantly flicker and the image would move up and down the screen

Does anyone have any idea what the problem may be, what things I should try to rectify this problem?
 
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