e4300 dell button

what is the button right top of the keyboad?
how do i enable it?
Hiroyuki TamuraField EngineerAsked:
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Does your keyboard look like this http://images25.fotosik.pl/310/8d1f4af82ac1939dmed.jpg

Are you referring the the silver square at the very top right?  If so, it looks like the power button.

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Hiroyuki TamuraField EngineerAuthor Commented:
this button.
I believe this is what they call a "Dell Latitude ON Button".  Latitude ON is a instant-on techinology that uses less power than running the system normal.  Info abotu Latitude ON is at:  http://support.dell.com/support/edocs/SYSTEMS/LatON/en/FAQ/FAQ_EN.pdf
An article about it is at:

And a diagram of yoru keyboard showing the Latidue ON button is at
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