Shut off monitor with fn key (I think)

Pavilion dv6. Playing a game, intending to hit f4*, I instead activated a special command I've never used with a laptop: a symbol that looks a little like a monitor - a rectangle flanked by two vertical lines. Screen went black.
I've tried esc and tried hitting the same command key. Without optimism, I tried cntrl-alt-del. I searched for a simple keyboard map, but I can't find one.
Any help getting my display back is appreciated. TIA.
* VERY annoying that the default is not the fn but the special command.
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Hi,
I would say from your description that you've set the video output to another ( non present ) screen option.
What OS are you running? If it's Windows 8, you will probably need to press f4, then the up arrow 3 times and hit enter.
For future reference, you can set the behaviour of the f keys to require the fn key being held down before the default action occurs as follows.
Shut down the notebook. Tap away at the esc key as you start the notebook to enter the Start-up Menu. Select the Bios option ( usually f10 ), then make the change shown in the document on the following link.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02035108&cc=us&dlc=en&lc=en&jumpid=reg_R1002_US...
Regards,
DP-K
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****Please mark Accept As Solution if it solves your problem****
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Microsoft MVP - Windows Experience

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