Go to Nvidias website, www.nvidia.com and manually down the the drivers for your card. Also this might be an issue with the TV/Monitor Combo, Dell used to sell the WD series of TV/Monitors. They were a great idea at first, but we later found they developed issues and the line was stopped.

EDIT: Another thought that just came to mind! Go to the Manufacturer of that TV/Monitor and see if they have a firmware upgrade. If they do download it and your TV should have a USB port you can plug a flash drive into.

Usually it goes something like this

Download firmware update to USB Flash drive > Turn off Display > Insert Flash Drive into USB > Turn on Display > Display will update.

LG had an issue with some of their LCD's that prevented them from recognizing certain signals from various input devices. Updating the firmware resolved it.