are you just wanting to turn off a secondary screen that is attached? are you wanting to run the screen in 'clone' mode? or is 'extended desktop' mode seemingly activated even though there is no secondary screen?
Same Problem
May 20, 2009
-   Clearing the checkbox causes the second monitor to stop receivinga video signal. When i F8 again to send the video signal to the monitor, extended desktop turns back on. It looks like a bug in windows... there's no way I can see to restore what you call "clone mode" once you have extended your desktop onto a second monitor. This is a problem since I need to be able to present to a projector, as well as work with the machine in extended desktop mode. Any ideas?
-   On my Gateway laptop, I extended the monitor, then turned it off to return to a mirror image, and now the second monitor wont work at all.
What can be done about this?
Thank You!
-   Guest
Apr 28, 2009
-   I have this same problem i cant get back to my desktop normall, i hit extended desktop, and it took everything away, when i right click an click personalize nothing comes up at all....... -   jmhzy
Windows vista : Right click on your desktop > Personalize > Display Settings > Click on the second monitor icon (monitor picture with number 2 in it) > Clear the checkmark at "Extend the desktop onto this monitor" > OK
Windows XP : Right click on your desktop > Properties > Display Settings > Click on the second monitor icon (monitor picture with number 2 in it)
> Clear the checkmark at "Extend the desktop onto this monitor" >
OK
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