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My laptop keeps overheating and turning itself off. Underneath it gets really hot.

Even playing 3D online poker is impossible, it just overheats. If it is on my lap, I try and balance it so it's sitting just on my legs and has loads of free space under it. This seems to help a bit (it's never turned itself off in this position) but even being on a desk can result in it overheating.

There is a lot of dust, etc that I've cleaned it out (as much as I can easily take apart anyway), but it never used to happen. Any ideas?

The laptop is a Lenovo 3000 N200.

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Consider a laptop cooling pad:

alt text

Sorry, but I couldn't resist!

alt text

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+1 for Hello Kitty. =) – Wesley Nov 4 '09 at 3:19
If you're male I propose using the second one at the office. – Manos Dilaverakis Nov 4 '09 at 14:33
so that's what's wrong with you... knew there had to be something... ;) – quack quixote Nov 22 '09 at 14:18

I had this problem a lot with my Toshiba laptop. I tried blowing out the dust and that didn't work. I tried a cooling pad, but it gets really annoying and severely limits portability.

What I did was to take it apart, replace the fan (which I think may have been faulty, it certainly had a lot of dust in it), remove the CPU, remove the old, dried up thermal grease, and apply new, high-quality, silver-based thermal grease.

Since then, I have not really had any problems with it. It only overheats after many hours of intense usage, compared to about five minutes before.

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You could try Undervolting your laptop.

Undervolting is a corollary of overclocking. Overclocking involves running a chip faster - and possibly with higher voltages - than specified to get more performance. Undervolting is running a chip at the same speed but at lower voltage which means less heat and longer battery life.

I'd had success using RMClock to do this. I followed this guide.

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Check out this article in the lenovo forums. It gives some suggestions based on your model. As Molly recommends, get a cooling pad so you don't burn your lap.

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Heres what you do:

Step one: Air Compressor :D

Step two: get a blade or somethign, Jam it in the Powered off laptops fan (So it dont spin when you blow it)

Step three: Blow into the cooling exhaust.

If that doesnt work, You need to get an aftermarket 20mm fan.

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