I need two monitors for efficient work on my CCNA courses. So, I have my Dell 30" LCD as my primary monitor running from Display Port at the card into mini-display port at the monitor. As a secondary monitor, I have my old Viewsonic VP201s 20.1" LCD running via DVI-I single link cable from card to monitor.
3 Weeks ago, it was working fine, but I was working with a trouble-shooting install of Windows - i.e. install Windows but don't activate it till I have all the problems nailed down & fixed. The day I hit 30 days on the install, the Viewsonic stopped working in Windows. I've since done a clean reinstall & activated Windows, but the monitor still not working.
It's not the monitor, the cable, or the video card....
Upon boot, I get BIOS, & Windows startup on the Viewsonic, it goes black & my login screen pops up on the Dell. When connected to other computers with the same cable, the Viewsonic works fine. I plugged both of my spare monitors into the same cable/DVI port on the card, and both of those work fine in Windows.
Just to make sure it wasn't some funky driver thing...I tried older drivers, going all the way back to January (well before problem started) with driver version 332.21.
I really need this monitor, work that was taking an hour now takes up to 2 1/2 hours. I can't use either of the spares without moving my computer setup to a different location because everything is a tight fit as is, and I don't really have a better place to setup.
At this point, I'm seriously considering taking the two VP201's apart (one has a dead backlight), and swapping backlights because the one without the backlight shows up just fine