How to Troubleshoot Multiple Displays Problem:

Problem & Solution

If there is no output on the secondary displays -  Activate the device in the Display Properties dialog box.

Confirm that the correct video driver is installed. Restart the computer to confirm that the secondary display is

initialized. If not, check the status of the video adapter in Device Manager. Switch the order of the adapters in the

slots. (The primary adapter must qualify as a secondary adapter.)

Extend My Windows Desktop Onto This Monitor check box unavailable - Select secondary display rather than primary in the Display Properties dialog box. Confirm that the secondary display adapter is supported. also confirm that Windows XP can detect the secondary display.

An application fails to display on the secondary display - Run the application in full-screen mode (for Microsoft MS-DOS-based programs) or maximized (for older Windows-based programs). Disable the secondary display to determine whether the problem is specific to multiple-display support.