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Laptop goes brighter when on battery, dim when plugged in

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#1
My dads laptop has been having this issue for a bit he says. He was having an error on boot that had an issue with the battery. And his battery couldnt hold a charge so i had him replace it. Thats all gone, but the dimming issue when plugged in is still there. I adjusted the brightness in ATI catalyst control panel but that just changed the white balance more than anything. I cant find a brightness setting in Win XP like I can in windows 7. Suggestions?
 
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#2
dosen't the laptop have a keyboard combination or buttons that increase the brightness
 

brandonwh64

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#3
What laptop is this?
 

AsRock

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#5
Look in the power saving options ( In control Panel ) you should see it there. You should be able adjust the brightness for when it's pluged in or on battery.
 
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#6
@AsRock, I couldnt find any brightness settings under power options for plugged in or on battery. I know they're there for vista and 7. Tried googling adjusting the brightness in there and didnt find much.

He's using a dell inspirion 1501. Ill tell him about the brightness buttons, see what he says.
 
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Processor Intel Corei7 3770K OC @ 4.5Ghz
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Cooling Corsair H100
Memory 16GB DDR3 1600 GSKILL
Video Card(s) Powercolor Radeon 7970, MSI Radeon 7970
Storage Mushkin Chronos Deluxe 240gb. 2 TB Hdd.
Display(s) 3x24inch Dell Ultra IPS
Case CM storm trooper
Power Supply Antec Quattro OC ed. 1200w
Software Windows 7 Business x64
Benchmark Scores vantage: P43089
#7
Fn and key worked. thanks guys
 

AsRock

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#8
Cool glad you solved it. I just have to press the F4\F5 keys.. Mines a 1764

Here's a pic were i was on about. Just edit the power plan you are using
 

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