Contra Arcade (presumably K700) Monitor Blue overlay tint.

[Zuckerton]

So I found a guy selling a Contra Arcade Cabinet for pretty cheap, as far as arcade cabs go; When I got out there it wouldn't turn on even though he swore it turned on the previous week, when I got back I realized that one of the "door switches" had tape on it, but wasn't taped down. I found the other one and pulled both out, the cab fired right up.

The picture was really fuzzy, so I adjusted the pots on the back and got the picture clear; after a few minutes of playing, the screen dawned a blue screen, which went away, but then came back. I adjusted the Blue cutoff and drive, and while turning up the drive made it more blue, nothing helped the tint. Periodically, it will go away, but it always comes back. I noticed it turn red a couple of times as well.

There was a K7000 manual in the cabinet when I bought it, but there is screen burn image at the top in places where the text isn't at (you can see the SBI 1UP is higher and a bit to the left in the pic), so I'm pretty sure this is not the original monitor. Another indication of this is that the monitor is upside down (I have DIPSW3 set to "on" to put it in upside down mode so the image is actually right side up), so it definitely had one removed and put back.

One other issue I noticed is the marquee light flickers periodically and when it does, there is a static-type line that runs through the screen. I noticed the bottom peg is missing from the power adapter, so I'll be grabbing a new plug on my way home from work tomorrow.

I just got this cab yesterday, so I haven't done anything aside from pulling out those door switches, messing with pots, and pulling the plexiglass out to wipe away the dead bugs.

Any ideas as to what could be causing this? Thanks.

[Zuckerton]

Anyone? Anyone? Bueller?

[SoundGammon]

If you tap, lightly, on the neck board & chassis does anything change?

[Zuckerton]

No, nothing changes. Sorry for the late reply, I was never notified that a reply was posted.