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When you reconnect an external monitor used for extended display on a Windows 7 laptop after laptop display has automatically set itself as the only one display, you need to re-enable extended display.

Consider the following scenario:

1.      Set the Close Lid setting to “Do Nothing” under Control Panel -> Hardware and Sound -> Power Options -> Choose what Closing the lid does

2.      Connect an external monitor to a Windows 7 laptop (or dock the laptop to a docking station).  This will result in a Cloned display configuration with the laptop display and the external monitor.

3.      Use Windows Key+P to extend the display to the external monitor.

4.      Disconnect the external monitor and use the laptop without the external monitor.

5.      Close the laptop lid, and connect the external monitor (dock) without opening the laptop lid.

When you open the lid, the display only appears on the laptop screen instead of appearing in an extended mode and both the laptop screen and external monitor.
Windows 7 will apply the last known display topology, which is the state of the laptop after step 4 above.
Use Windows Key + P to extend the display again to the external monitor.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 2274948 - Last Review: 07/09/2010 21:59:00 - Revision: 1.0

Windows 7 Enterprise, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate

  • KB2274948
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