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Turn off display in Windows 7 without additional software

I've got two monitors. When I play a full screen game in my primary monitor, the second monitor still shows the Windows desktop. How can I black out the second monitor so that it doesn't show anything at all? My graphics card is from ATI.

I'm running Windows 7 in Boot Camp on an iMac. I don't know if this makes a difference, however, as any solution to my question will do, really. For instance, is there a tiny app that I could run to disable the second monitor for a while? I'd rather not have to open Windows display settings every time I run a game and disable the monitor that way, though.

marked as duplicate by Ƭᴇcʜιᴇ007, 3498DB, Indrek, Nifle, ChrisF Oct 10 '12 at 10:00

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As you've said "any solution will do" and you want something simpler than disabling the monitor via Windows display settings... I propose the following.

Push the little button in the lower right hand corner of the second monitor that looks like this: (|) ...It'll turn off the power to that monitor, blacking it out.

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