Broken monitor?

Hi

Had my new pc for 6 days when suddenly whilst watching something on Netflix, a third of my screen was taken up with these weird vertical lines. It's permanently stuck like that now. I can move the mouse to that side but can't see what I'm doing. It's also like this no matter what I'm on, loading screen, BIOS etc.

I'm using a DVI cable. There's a slot on the monitor for RGB cable, should that be connected, too? It's been working fine for 6 days.

The monitor is Samsung SyncMaster LS27C45KBSV/EN 27"

Any help would be appreciated.
 
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