I am using a VGA connection to my Lenovo T420s Laptop running Windows 7. A few days ago the desktop on my relatively new Acer monitor disappeared. The wallpaper remained, but nothing else (even my mouse cursor, task bar, and Windows icons). I could only work on the laptop's screen, which still works fine. When I plugged in an older monitor everything worked fine. But today the older monitor experienced the same issue. I am now incapable of working with an external monitor (which I really need for my work). The monitor manufacturers all believe it's a computer issue, which makes sense. I updated my drivers with Lenovo, but that didn't help.
My resolution settings are correct, with the Duplicate Displays setting activated. I made no changes to my system since the monitors worked fine. Any ideas?