Oke so i'm aboding the idea of fixing this problem in the Menu of the tv its self. so i'm going for the suggestion PunkRockCavemand made
Often tvs are "calibrated" at the factory and there are no pots for h/v-hold or other stuff you can regulate on an arcade monitor chassis. I had some tvs that had fixed resistors for some settings that easily could be exchanged with pots and voila ... manual settings were possible
You need the schematics of that chassis for that reason and have to locate the (missing or fixed) resistors for h/v-hold in order to swap them with pots. Sometimes the pots are just fixed with glue or something ... maybe have another look to find that ones. You will need the schematics anyway to see, where the different settings are made.
I found the schematics here
http://www.scribd.com/doc/26784858/GRUNDING-C7-C8-chassisNow i understand electronic schematics but i don't yet understand the working of a tv good enof to find the resistor that dos the job of the vertical sync part.
I think i need to chance the resistor thats on page 23 and on the big chip right side 4 and 5 for the top.
Is there somebody who could say if thats the good resistor? Thx in advance.
Also found a other monitor same size that doesn't has this problem but has a dirty scratch in the middle you don't notice it when you play for longer then 1 minute but it isn't ideal what your your thoughts on that?