Troubleshooting Multiple-Display Support

If you are having problems with multiple-display support, use the troubleshooting guidelines listed in Table below.

Troubleshooting Multiple Display Problems

Symptom	Possible Solutions
The Extend The Desktop Onto This Monitor option isn't available.	If the Monitor tab of the Display Settings dialog box doesn't give you the option Extend The Desktop Onto This Monitor, confirm that your secondary adapter is supported for multiple-display support. Confirm that you have the most current drivers (that are Windows 7-compliant and support dual-mode capabilities) loaded. Confirm that Windows 7 is able to detect the secondary video adapter. Try selecting the secondary adapter rather than the primary adapter in the Display Settings dialog box.
No output appears on the secondary display.	Confirm that your secondary adapter is supported for multipledisplay support, especially if you are using a built-in motherboard video adapter. Confirm that the correct video driver has been installed for the secondary display. Restart the computer to see if the secondary video driver is initialized. Check the status of the video adapter in Device Manager. Try switching the order of the video adapters in the computer's slots. See if the system will recognize the device as the primary display.
An application is not properly displayed.	Disable the secondary display to determine if the problem is specific to multiple-display support. Run the application on the primary display. If you are running MS-DOS applications, try running the application in full-screen mode. For Windows applications, try running the application in a maximized window.

Now that you have configured Control Panel and the display adapters, let's look at how to configure your power options for mobile computers.