Help with arcade monitor's v hold problem - Fixed, Nevermind

[JKJudgeX]

Hey, about 4 months ago, I had this arcade monitor working, it's a wells-gardner from an old street fighter 2 machine...

What happens now, however, is the screen starts to roll any time the colors on the screen change... 

I can lock it into place so that it sits where it seemingly should, but, any change to what's actually on the screen causes it to slowly roll up or down... I'm not changing resolutions, here, literally the on-screen color levels seem to make it roll...

Anyone ever experienced this or know a fix?


Edit: I am using powerstrip to get the appropriate resolutions, as I did before, using the built in 640x480i resolution for arcade.

Edit 2: NEVERMIND
The entirety of the problem was that my JPAC had become disconnected, and I hadn't noticed (just went about assuming it was reconnected to the new computer)...

Bottom line, the JPAC is handy... but you have to plug it in.  Thanks.  I'll leave this message here in case someone else has a v-hold problem, so they'll have a chance to see that the JPAC could possibly be a solution or need plugged in .  I'm an idiot.



Thank you!
-JX

[DaddyLongLegs]

If you read my thread on this page I had the exact same problem

It's funny the JPAC works at all when not plugged in. If it didn't work at all then I would have figured it out way sooner.