|You probably have a hardware on the monitor problem, or a lot less likely, a connection of the monitor problem. It's NOT likely a video adapter on the computer hardware problem, but if you have it plugged into a video card installed in a slot on a desktop computer, you could try removing the AC power to the computer and making sure the card is properly seated - all the way down - in it's slot, and if the card has a fan make sure it and it's heat sink is not clogged with dust and lint, and that the fan works when the computer has AC power (any of those things being wrong can cause the video chipset to overheat). |
Those symptoms probably can't be caused by a software problem.
To confirm that, try the monitor for a reasonable amount of time with another computer. If you still have the symptoms, it's probably a hardware on the monitor problem, not a connection of the monitor problem or a video adapter on the computer hardware problem.
Take it to a local place that is authorized to work on Samsung monitors and have them analyze it. It may be that just a minor part needs to be replaced.
Samsung models are generally more reliable than most brands, but some models have hardware bugs.
You could try searching the web with your model number and lines or similar.
A friend of mine had a Samsung LCD TV she used mostly as a PC monitor. It developed black and white only video in TV mode, and it's board was replaced at no cost to her, locally (it happened after two plus years of mostly 24/7 use - it was still under warranty).