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Before merging with HP, Compaq manufactured a full range of laptop computers. Now they are manufactured by HP mostly with basic features.

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Why is my Compaq Laptop CQ58 screen brightness changer not working?

One day i opened my laptop from sleep and the screen was really dark so I tried to making the display lighter but it was on max so I tried turning it on and off again but still didn't work. Some things I have done before I turned it on was leaving the plug in all night while in sleep mode and i usually close the lid fast. Could this have cause it? How can i fix this? I can't get any external monitor so don't tell me to plug it to any other monitor. I tried pressing F2 and F3 as well.

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It's possible that your backlight is broken, what type of Compaq laptop do you have?

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No leaving the computer in sleep mode and closing the lid fast would not normally ruin a screen unless you really slam your screen closed and break a cable or back light. This could either be a problem with the back light or a problem in the OS that is not allowing you to turn up the brightness.

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Tnx it turns out my Security Suite (which sucks at firewall) blocked many System apps and now I uninstalled it and bought Norton 360. Tnx for the help anyway.

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can you tell me what did you fix?

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can't work brightness key

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Steven Muzo sarà eternamente grato.
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