I'm using the old Samsung syncmaster 570s tft and few month's ago my monitor started to display waves on the screen but the picture is stable(nothing is moving just horizontal waves).
It started when the electrical company mess with the voltage(instead 220v they pump it to 300v). At that time i started my computer for few seconds then i shutdown very quickly after noticing the voltage is not correct. I checked the monitor adapter with my hand and it was very hot but it was still working. After voltage correction i started my system and noticed the monitor adapter got very hot after few minutes of usage so i decided to take it a part and saw two swollen caps. I continued to use for about a week then it started to get worse. I was playing Dragon Age 2 then quickly started to saw horizontal waves which comes from down and go up(image stable no flickering), i checked the monitor adapter and it was super hot and immediately i shutdown the system.
I took the adapter to the repair guy and he fixed it. Came home and connect to the monitor and it works well but still the monitor display horizontal waves(i can see them clear if i use gray background color). In the past i experienced similar problem but i found it was bad vga cable but the same bad VGA cable works well with another monitor.
I borrowed another VGA cable from a friend(works well with other monitor) but still horizontal waves on the screen.
Today i decide to open the monitor and inside there is no visible damage(bad circuit or bad caps). Right now my head is spinning(can't figure out the problem) or may be i should buy a brand new VGA cable?
I tried to connect the monitor with two different systems and received the same results(horizontal waves).
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