Macbook Pro overheating problems.

I am running OS X Lion on my Macbook pro (late 2008) and it has been over heating for the past 2 months. I noticed that it was getting warmer than usual initially but now it gets too hot it comes up with the grey screen and forces me to do a manual shutdown. I can't even turn it on immediately because I think the it's so hot the pre-boot up check realises it's so hot for it to be start. I get 2 beep sounds and a pause whenever I try and turn it on after a forced shut down. I normally have to wait for it to cool down before I can turn it on again. I have tried cleaning the fans but that did not help. I should take it to the Apple Store but I don't want to give away my laptop for a week or so hence why I am trying to solve it myself if it's possible. Any ideas? My guess is the heat sinks not being as effective as they used to be?
Thanks,
Omar

about my experience in kernel panics, mbp 17 no boot, freezes etc etc, i would recommend an Apple Authorized Repair Center as soon as possible. there are many thing that can goes wrong. Gpu and Cpu becomes very hotter during normal usage and if there aren't some slowing down performaces, it seems normal. A couple of week ago my mbp 17 core 2 duo start to freeze sometimes. Sometimes very often. My first think is an overheating problem due to intense cpu and gpu works but after a while, i realized that is totally random. my mac can stay on in idle mode for hours and freeze as soon i open firefox or safari to load a youtube vid.... and vice versa. Smc gave me an illusion but if there's an hardware problem, soon or late, it occours again. to be honest, ear fans at 6200 rpm most of the time is kinda annoying and noisy. So i decide for the apple authorized repair center. they diagnose a faulty nvidia gpu and after replacing the whole logic board, my mbp seems brand new. it becomes hotter as a brand bew one but it's absolutely normal. it's a laptop..no cooling fan like many others but only 2 fan to extract hot air from inside to outside.... it have aluminum chassis and this work like a big cooling system.
there are many little pieces on the logic board and a faulty one can be a problem. A broken thermal sensor or a broken diode can compromise some other pieces to work in the right way. So, don't waste your time searching  a band-aid to your problem.... take it to an official repair center.. they know how to solve your problem.... at least, they do a try :)

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    Message was edited by: OGELTHORPE

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    Welcome to Apple Discussions!
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    Get it? ALL these notebook manufacturers’ designers and engineers are all using the same data/designs! Yet, I’m paying TWICE THE PRICE for an Apple product (expecting a cool running notebook) vs. a custom-built HP 17” notebook PC that I bought brand new a few years ago (with Vista – ARGH!)! One which would run simultaneous DUAL EXTERNAL monitors at 1080p! That GPU kicked butt! AND it had DUAL SATA2 INTERNAL Hard Disk Drives (with the internal DVD burner)! And this was made in 2009 people!
    I thought Apple cared more! Especially at this price!
    Maybe you DON’T “get what you pay for” anymore…?

    ..Step by Step to fix your Mac
    Mac maintenance steps

  • Macbook Pro overheating after OS X update (10.10.3)?

    After update my Macbook Pro is overheating, mainly the HD, anybody with the same issue? or how i can fix it?

    Please see this Apple article:
    Runaway applications can shorten battery runtime, affect performance, and increase heat and fan activity - Apple Support
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