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Acer :: Aspire 4937G In XP Cannot Adjust Brightness

just brought acer aspire 4937G to replace my dead 5584(which the graphics card dead). so reinstall XP from old laptop to new one.

before i install the graphics driver, i'm able to adjust the brightness. but after i install the driver(latest from acer), i totally cannot adjust the brightness. is either very dim, or very bright.

i tried getting latest driver from nvidia, but during setup, only HD audio, dont have any display driver to install.

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jus brought this for 2 weeks. clean install wit Win XP Pro SP3. but than wat makes me frustrated is tat when i use windows media player 11 to play mp3, as well as surfing net. somehow the song jus lag, but did not pause.

at first i thought is windows media player issue, so reinstall it, but stil the same. i than reinstall sound driver(Realtek), but doesnt help too. so went on to try other player, like winamp, media player classic. but didnt help too.

went on to power options to adjust to "Always On" which the speed n voltage wil be fix at max. it improve a bit only. however this only works on my previous laptop(Aspire 5584), but did not works on 4937G, when i observe it wit CPU-Z, Everest. the multiplier stil adjust either 6x or 10x. voltage also too..

i also did all the windows update, tweaks as well.

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i believe many of u experience gpu reaching near 100 degrees when gaming, causing laptop to jus turn off by itself.

a gd news here..copper shim solve the problem, which means it lower down temp to prevent tat from happening.

received copper shim in my mailbox yesterday.

thickness is 0.044", 1.11mm, 0.1cm

size is 0.75", 19.05mm, 1.9cm (kind of too big for gpu, becos the seller hav tat size for tat thickness, but nvm, look below)

wat i do next is to use a sand paper(fine one, not rough one), i use 1000cw since i had tat at home. lazy to go out to get more fine one.

do it on a flat surface, sand until like mirror effect.

now proceed to dismantle the whole laptop.

it seems tat the heatsink is too small for tat copper shim, but no need to worry, the surrounding alum is a little lower than tat copper.

using Arctic Cooling MX-2. apply on both cpu, gpu, n on copper shim after placing over gpu.

Stress test results

*Ambient Temperature: 32 degrees

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After thermal pad was replaced by Copper Shim.
temperature was still steady at 88 degrees after 11mins!

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FN - Brightness Down brings up a on screen display showing the brightness level at full and goes down by about 1, though I see no different in the brightness. It doesn't matter how many times I press the button, it never goes down more than 1.

Control Panel -> Display -> Adjust Brightness -> Power Options: The slider at the bottom shows the brightness level at lowest setting. The FN - Brightness adjustment will move this slider up / down on the scale, but there is no change in the screen brightness.

Anyone have any ideas as to why I can not adjust the brightness and how I can get it back to where I can adjust it?

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Even when i switch to that has brightness set to like 80% nothing happens. I went to maxium preformace profile and for some reason it is set to 0% when I change it to 100% and hit apply 2 seconds later it changes back to 0%.

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to 100% 2 seconds later it goes back to 0%. This is even when it is plugged in or has a full batter.

Even when i switch to that has brightness set to like 80% nothing happens. I went to maxium preformace profile and for some reason it is set to 0% when I change it to 100% and hit apply 2 seconds later it changes back to 0%.

Out side of windows(ie the login screen) I can change my brightness to 100% and it will stay there it's when I login it reverts to 0%.

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