Vertical hold not...holding!

[dprush83]

I have an arcade monitor that is scrolling from side to side.  I can use the vertical hold switch to control it, but can't get it to stay anywhere. After VERY carefully messing with the switches I got it to stay where I wanted, but after 2-3 minutes it went back to the same problem. If a video of what I'm talking about is needed I can post that as well. Any thoughts on what could be doing this?

[MonMotha]

Has it EVER worked?  An extremely touchy hold control like you describe usually means you effectively don't have sync hooked up at all which may be a problem with sync format - composite/separate, polarity, etc. - and where you have or don't have it hooked up: many monitors effectively have 4 places to where one can hook up composite sync, and only one of them will be correct depending on format.

Also, since you say it's rolling side-to-side but you're adjusting vertical hold, I assume this monitor is mounted vertically?  Just wanting to get terminology straight since that can cause confusion.  It shouldn't affect any of this electrically.

[dprush83]

I just purchased the cabinet and apparently this just started happening (which is why he wanted it gone, he ran a business).  And correct, it is mounted vertically.

This is the first monitor I'm working with (I've put it off long enough, time to learn  ) so I will research how to get the sync hooked.  After your post I pulled up this, am I on the right track to what you are talking about?