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Not so Simple screen brightening on my laptop

By Heikkin ·
I Have a Dell Insperon 1720 laptop. recently after I wiped the hard drive the screen doesn't get to the max brightness like when its plugged in, effectively making it only useful when plugged in. I have tried the fn + brightness key but it get to a point where I can barely read the screen. i have also played with the power setting for the computer but it didn't help. any ideas?

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Check the BIOS settings

by LarryD4 In reply to Not so Simple screen brig ...

With in the BIOS settings of the laptop should be controls that limits the brightness of the laptop when plugged in or on AC power. This is the upper limit threshhold of brightness. See if you levels are lower then the max.

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Default settings reduce brightness when on battery power ...

by OldER Mycroft In reply to Not so Simple screen brig ...

30% of laptop battery power is consumed by the optical drive when in use.

50% of laptop battery power is consumed by the screen when at maximum brightness.

Assuming (after wiping the hard drive) you have a fresh install of your operating system, then the default settings are to chop the brightness when on battery power for obvious reasons.

You'll have to hunt for the power setting governing how the OS reacts when switched over to battery power.

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