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Repair and disassembly guides for the Compaq Presario CQ40.

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Why is my laptop not turning on?

Whenever I switch off my laptop, it doesn't turn off, it just goes to a black lit screen (no I am not joking) and stays like that until the battery runs out. After that, it doesn't even turn on for days. It does switch on after staying Idle for a week or two but the problem always repeats when I turn it iff again.

P.S. It is very old but runs perfectly when it is on, the problem only occurs when I switch it off.

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What OS is installed in the laptop?

What happens if you hold the power button to force it to shutdown?


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1 Answer

Amaan Shikoh this sounds like an issue with your OS as @jayeff is already hinting. You can check if there is a BIOS update for your computer or re-install your OS. In your command line type

shutdown -s -f

and see if that works.

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Amaan Shikoh will be eternally grateful.
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