..please try visiting the graphics card manufacturer's site and downloading, then installing an updated driver for your specific card. It may help if your current driver has become corrupted. The graphics card manufacturer can be found in Device Manager, under the "Display Adpater" listing, "Driver" tab.

Generally, if the display suddenly starts having issues, it's the cabling from the motherboard to the screen or the screen itself. Either one will require actual repair and that can be expensive unless you've got an extended warranty..

Hope this helps.