I purchased a Namco Lucky and Wild arcade cabinet over the summer of 2012 and it has had video problems from the start.
Originally it looked like this
http://www.youtube.com/watch?v=wYvsGP4AYnc
After they shipped the chassis back for repairs it looks even worse...
I don't think it clears up when I smack it but I do understand what you are getting at.
When the wires of the coin door mech are slightly moved sometimes the video gets better and sometimes it gets worse.
The wires are not being moved much at all, sometimes just a a few millimeters and they...
Everything appears connected properly besides one of the coin mechs. I disconnected the coin mech from the counter and it didn't fix it.
All of the ground wires seem to be intact. Is there a specific way to check the continuity of the video ground? Am I just looking for holes, burn marks etc?
I just purchased a Lucky & Wild cabinet and the video is bleeding and has snow moving down and slightly to the right:
http://www.youtube.com/watch?v=wYvsGP4AYnc
Occasionally when I am opening and closing the coin door the game brightens and the other issues clear up a bit.
How can I fix this?