you have a sync issue.
try adjusting your H- sync and your V-sync.
the H-sync is on the chassis behind the flyback, and the V-sync is on the remote board.
and check the two pots on the main DKJR PCB they can affect the pic as well.
if this monitor has never had a cap kit it needs one badly.
a Sanyo will look it's best after a cap kit and a color and wite balance done.
the only issue is, it is not a recommended first chassis to do your first cap kit on.
plus the chassis is allot more fragile than others and if handled to rough it can break.
if you want it fixed i can do it for you.
email me from my website.
www.thearcadebuffett.com if you need any assistance with it.
also check out my youtube channel for monitor repairs i have done.
https://www.youtube.com/user/buffett1978?feature=mheePeace
Buffett