05-03-2013 02:03 AM
The ThinkLight toggles on/of with keypress of Fn+PgUp - the one with a light bulb symbol on it at the top right hand corner of the keyboard.
09-13-2016 06:00 PM
Your post is empty, but if you're asking about the T410 keyboard backlight I don't believe it has one.
You should be able to turn on the "overhead" ThinkLight with Fn-PG UP.
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