Sony VGN-U750P VAIO Read This First Manual page 108

Deactivating the Multiple Monitors function
To deactivate the Multiple Monitors function, proceed as follows:
1 Click Start, and then Control Panel.
The Control Panel window appears.
2 Click the Appearance and Themes icon.
3 Click the Display icon.
The Display Properties window appears.
4 Click the Settings tab.
5 Click Advanced.
6 Click the Intel(R) Extreme Graphics 2 for Mobile tab.
7 Click Graphics Properties.
The window with its name beginning with Intel(R) appears.
8 Select Notebook on the Devices tab.
9 Click OK.
If the Confirm Desktop Change window appears, click OK.
The window in step 6 appears and the display of your choice is activated.
10 Click OK.
The Display Properties window appears.
11 Click Cancel or .
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For switching from Primary to Secondary display, see Selecting display modes.
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Connecting peripheral devices