Method One: The monitor does not support this resolution
1, press and hold the power button to force the shutdown, and then reboot, in the system before entering the F8, into advanced options;
2, with the next key to select "Enable VGA Mode", press ENTER;
3, according to their own display change resolution: 19 inch LCD Monitor (PU) 1280x1024,19 inch LCD (Widescreen) 1440x900,20 inch LCD (Widescreen) 1600x900,22 inch LCD (Widescreen) 1680x1050,24 inch LCD monitor (widescreen) 1920x1200.
Method Two: Graphics driver mismatch
1, press and hold the power button to force the shutdown, and then reboot, in the system before entering the F8, into advanced options;
2, with the next key to select "Safe Mode", press enter into;
3, right click on the computer, and then choose management;
4, select Device Manager, point open display adapter, right-click the graphics driver to choose to uninstall;
5, check "Delete this device driver software" click OK;
6, to the computer brand official website according to the specific model download graphics driver, and installation.