Mortal Kombat 2 Video issues

tnglc79

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I am working on a Mortal Kombat 2 board that has some vertical lines running up and down on the screen. This is the worst it has looked. It is generally playable but the back ground images have a few lines in them.

So far I have tested and verified all ROMS, (corrected 3 bad ROMS on the main PCB) and replaced the UA11 RAM that was showing bad in test. Now all tests are good, but the problem is still there.

Anyone had this problem or ideas on a solution?

Included a picture of monitor during test to show the monitor is fine and the bad ua11 which has been replaced.
 

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It is dead now

Nevermind. After running it for a little bit it shut down and started checking all the UJ roms bad. Upon magnifying glass inspection this time, there was some damage to the UA13 (bent pins touching each other from some type of impact). At this point I am calling the board dead and no longer going to attempt repair as there are no replacements. It'll make a fine parts board down the road.
 
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