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Sounds like a piece of software is lowering the brightness of the screen. Do you have one of those laptops with some keys assigned special functions? (usually accessed by holding down a 'Fn' key and pressing the appropriately marked key) If so, try raising the brightness using that. Or boot up in safe mode and see what, if any, display controllers are being loaded up on startup. If there isn't one, it could be something hard-wired into the laptop that's acting up. Not sure if you can flash a laptop's bios and controllers...have you checked Dell's site to see if this is a known issue? |
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