Oh, thats a solution I have used in the past to ghetto-rig cables, lol.
That probably means the monitor itself has a dodgy connector and the sync isn't strong, or isn't syncing at all!.
I advise using this RCA for sync solution. Don't open the monitor. Blowing your self up over it isnt worth it.
I made a cable one time that is both the RGB and RCA in one cable so its a bit neater. You can mimic that with a few zip ties or some tape.![]()