How do you change the brightness on a laptop with Windows XP?

When I unplug the laptop from its power supply, the display gets really dark. I know how to change this on Vista, but not on XP. Help!How do you change the brightness on a laptop with Windows XP?
Most laptops have a Function button on the keyboard to adjust brightness. Try Fn - Up arrow.



Look for the symbol that looks like a Sun and a plus sign.



You can also log into the BIOS and adjust power/brightness settings. This depends on the brand of your laptop.How do you change the brightness on a laptop with Windows XP?
Press fn+f8 to make raise bright of ur pc (fn botton is found near windows key or bottom key line)

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How do you change the brightness on a laptop with Windows XP?
What kind of laptop do you have??



On my laptop, on the function keys, there are pictures of various items. One of them may look like a sun with either an up or down arrow. These change brightness. If you use the FN key, and press the keys mentioned above a few times, you should see an increase in brightness.



But again- my laptop's an HP- it might be different on yours.How do you change the brightness on a laptop with Windows XP?
put a new batteriess in it when a batterie gets Lowe the screen darkens automatically to reserve power.