I had been using a Samsung SyncMaster 213T with my older Vista (32-bit) desktop and nVidia GeForce 7600 graphics card (DVI port) with no problems. So my old system (mobo) decided to finally die, and I got a new desktop system and a new Samsung SyncMaster 2494HM widescreen to go with. The desktop is from Dell, running i7-920 and Windows 7 Home Premium 64-bit, and nVidia GTX 260, which has two DVI ports.
I hooked up the 24" monitor as the primary and the 21" as the secondary. After installing the driver for the 24" monitor, Windows recognizes the model etc. My 21" still shows 'Generic PnP Monitor' and won't let me install the included driver (it's old from 2005) and says the driver (from MS) is up to date. However, I am not getting anything on the secondary monitor, it's just black with the floating "Check Sync Cable". I have tried disconnecting and reconnecting the DVI cable from both the graphic card and the back of the monitor, but no change. Also, when I go into properties, it shows two screens, so I click on the secondary one and it's listed as SyncMaster, but the properties for that monitor still show Generic PnP.
I emailed Samsung for help, maybe a semi-new-ish driver, but they replied to check with the PC vendor. Am I doing something wrong with the connections? Any help would be appreciated. I know my 21" LCD is still in good or excellent condition. For now I have that one turned off. Even then, I took a PrntScrn screenshot of my main desktop, and pasted it into Paint....it actually shows both desktops together (duplicate wallpaper) and I noticed my cursor disappears off into the blackness when I move it to the right edge of the main screen. lol, weird. help!