Mortal Kombat 2 rolling screen? Monitor or Board?

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have you tried adjusting the hold pots on your remote board for your monitor?
 
Vertical hold. The adjustment is either on the remote board or the back of the chassis. Pretty sure that adjusting it will fix you right up.
 
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Looks like the pot needs adjusted with a small allen wrench. Is that safe to do?
 
understanding the Hantarex Polo:

H. Amp = H. Size
H. Freq = H. Hold
H. Shift = H. Position
V. Amp = V. Size
V. Freq = V. Hold
V. Shift = V. Position
Bright = Brightness aka Black Level
Contr = Contrast

consequently, you want to adjust the V. Freq to get rid of the roll. it's not out of the ordinary for your Vertical Hold to be adjusted just ok enough to work with one game and then not the other. there IS a way you can get it to work with both games, it's just going to be something you get on the first try or it's going to take a few attempts.

your remote board looks like someone took a bite out of the upper right corner. please ensure that one pot is still making a connection to the solder points on the back side. and some ignorant ass removed the remote wiring from it too.

also, enjoy your working Polo while it lasts.
 
also, enjoy your working Polo while it lasts.
I've never had the pleasure of working on a Polo before. Are they a pain to work on and not reliable? I seem to recall someone on RGVAC said Midway used the Polo on dedicated MK2 cabs and then switched to K7000's. Mine came with a K7000 but of course someone could have swapped it at some point.
 
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Those adjustments did the trick! Thank you all for the assistance!

Now to finish the citistrip / liftoff part... 3/4 done! Another MK2 restore thread coming soon!
 
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