Why your mention of "analog"? Did you switch to digital now? In that case: does analog work in Windows 7.
For monitors, usually there are no drivers. But they might come with an inf-file. Did you check that?
Kees
After installing windows 7 and all drivers for my Samsung t220 screen and Nvdia GeForce 9800 GT, neither windows 7 nor Nvidia reconognize 1680x1050 resolution. Maximum resolution permitted is1280x1024, very deficient. Had no problem with XP and analog cable). I have tried powerstrip and created a personal driver with a 1680x1050 resolution, but with the same negative results.
Buying "just" another screen is no option!!
Samsung doesn't provide specific drivers for windows 7.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic