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Overheating laptop - I cleaned the fans... Suggestions?

post #1 of 21
Thread Starter 
My uncle said his laptop kept overheating and shutting off all the time... so I took a look at it and found the fans to be pretty clogged. I tried booting up the laptop and ran a temperature sensor. It read around 158F or 70C. After browsing around YouTube, it would shoot up to 212F or 100C pretty quickly where it shuts down completely.

I disassembled it, took out my air compressor, and cleaned almost every last spec of dust on it. I went through the fan, all the heat sinks, and the casing. I then took apart the CPU heat sink, got rid of the thermal paste, and re applied some MX-3 on it. Thinking I solved the problem, I reassembled it and connected it back together.

However.. it still overheats. It helped, but after all that it wasn't the solution. I've even tried running it on safe mode and it still gets extremely hot. I looked around and it shouldn't be software... Where should I go from here?
Edited by ramapple - 5/20/11 at 10:17pm
    
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post #2 of 21
Try to force the fan speed in the bios, but more than likely you won't have an option in the bios. You could try a program to force the fan speed, but it could be the same thing.

Depending on how old it is, it could just be that the fan is going out.
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post #3 of 21
You're 100% positive the fan is working?
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post #4 of 21
I have seen some laptops that overheat unless they have a bios update that will fix the fan speeds.

See if there is a bios update for it.


Also whats the make and model of the laptop?
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post #5 of 21
Hi,
This may sound like a noob question but it is always relevant and people forget this.
Do you have sufficient thermal compound on the cpu and heatsink. If not it may help to put some on.
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post #6 of 21
Thread Starter 
I just checked and I don't see any settings on the BIOS to change fan speed.

When i place my hand under the laptop I can feel air coming out, even though it's not very strong (but my laptop doesn't pump out a ton of air either).. so it "seems" like it's working fine.

The laptop is an Acer Aspire 4730Z. Is it possible for two processor chips in these laptops? The heatsink was attached to the CPU which I reapplied the thermal paste on, but it was also attached to another green piece which looked like a CPU but it seemed to be embedded into the motherboard. It was already somewhat coated with some weird yellow substance so I didn't remove and apply thermal paste on that.

How essential is it to completely wipe off the old thermal paste? I used a credit card and did the best I could, but I doubt that would be causing this problem when a new layer is coated on top of it?
    
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post #7 of 21
Well you want to remove the old paste first some you get a nice clean contact or else you will have the old crappy paste and a blob of new stuff which will make it too thick and well not really help. I fixed my friends laptop had the same problem as you and well i bought a laptop cooler. computer runs perfect. it still runs hotter than i would like to see it but it solved the overheating and shutdown. I told my friend just don't play heavy games or do a lot of things at once or your laptop will shutdown. i know the fan is going bad...makes a lot of noise and u can here the motor just crying to be replaced lol. oh and i re-oiled the fan too!
post #8 of 21
To clean thermal paste take a q-tip, dip it into rubbing alcohol and rub it on the cpu. Repeat with multiple q-tips 3-4 times and you'll have a damn clean CPU. This is the best way to do it IMO. If you're worried about the q-tip leaving fires, just give it a couple shots of air from a can of compressed air.

As people have stated, if you have old paste on the CPU, the new stuff won't do anything.
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post #9 of 21
hi have you tried undervolting it?
    
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post #10 of 21
Quote:
Originally Posted by bortoloy;13584318 
hi have you tried undervolting it?

would be hard to do seeing its not a custom laptop i resume. You would have to do stability tests with will lead to him overheating.

you can try but idk if it will work. depends on your luck wink.gif
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