I have a dell Precision M6500 laptop with the ATI Firepro 7740 Video card. Last night while using the computer with an additional monitor connected both screens blacked out then my desktop appeared again on the additional monitor, however the laptop screen stayed black. Nothing I did would bring the laptop screen back. Ultimately I shut down the computer, unplugged the external monitor and then rebooted the computer. The laptop screen came back but at the wrong resolution. When I tried to change it to the correct resolution I noticed that there were only two listed. After further investigation I discovered that windows was using the "Microsoft Basic Display Driver". When I open device manager and click on display it shows only the ATI FirePro 7740 graphics card., and when I open the properties for that it says "No drivers are installed for this device". I uninstalled and reinstalled a few different drivers, but nothing I have done changes what graphics are being used and does not change the status of the ATI properties.
Does anyone have any ideas what I could try?
