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ITsVISTA KB-Link: KB959657

An external monitor does not turn on after you reconnect it to a Windows Vista-based portable computer after the monitor is disabled and re-enabled

Consider the following scenario:

  • You connect an external monitor to a portable computer that is running Windows Vista.
  • You disable the portable computer’s built-in display.
  • The portable computer turns off the external monitor because of the lack of user activity.
  • You disconnect the external monitor, and then you resume the portable computer.
  • The portable computer’s built-in display turns on.
  • You reconnect the external monitor.

In this scenario, the external monitor displays a black screen.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB959657.

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