Do you have the proper video drivers installed? When you goto device manager, what does for display adapter?
The monitor is a Samsung SA550, says so in the title and it's a LED 1080p monitor, so the monitor isn't the issue.
I KNOW what it says in the title...I also know there are various models of SA550s...going up to a 27 incher, they all have different resolutions...
All the best Brett