Had a similar issue with an old samsung synchmaster. The capacitors were the problem.
There are a lot of similar 10 year old reports on the net. E.g.: https://www.badcaps.net/forum/showthread.php?t=24494&highlig...
There are a lot of similar 10 year old reports on the net. E.g.: https://www.badcaps.net/forum/showthread.php?t=24494&highlig...