shortcut key to turn off (and on) a laptop monitor?

[Guest]

I know there are a lot of shortcut keys on Windows. I make a lot of them for
programs, just for convienience. But I still can't get the keyboard shortcut
key to manually turn off and on my laptop monitor. What is a shortcut key to
turn off a laptop monitor running on Windows XP?

 

[Pennywise]

I know there are a lot of shortcut keys on Windows. I make a lot of them for
programs, just for convienience. But I still can't get the keyboard shortcut
key to manually turn off and on my laptop monitor. What is a shortcut key to
turn off a laptop monitor running on Windows XP?

WinKey, U, U