Decrease Brightness (fn+f7)
The fn+f7 hotkey decreases the brightness of the notebook
screen. The longer you hold down the fn+f7 hotkey, the more the
screen dims. Decreasing screen brightness conserves power.
» To increase screen brightness, press the fn+f8 hotkey.
Increase Brightness (fn+f8)
The fn+f8 hotkey increases the brightness of the notebook
screen. The longer you hold down the fn+f8 hotkey, the more the
screen brightens.
» To decrease screen brightness, press the fn+f7 hotkey.
SOURCE: Compaq Presario V2000 laptop stuck on compaq logo screen
when turning on the system go into the BIOS and reset back the seeting s to factory defaults and reboot the system .. If this fails then reseat the Hard drive may have come loose or ?
did you recently add new software ? drivers ? hardware?
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