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laptop cpu overheating -- heatpipe not working?

V

venm11

2[H]4U
Joined
Oct 6, 2004
Messages
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A friend has a laptop which regularly overheats and shuts down. The cooler is one of the usual heatpipe / fan / copper heatsink units. The fan seems to work normally, and there is no dust gunked up (the normal culprit).

The odd thing is that the heatpipe is very hot near the CPU but as you feel down the pipe it cools off rapidly- the heatsink itself is barely warm. Is this normal, or does it indicate that the heatpipe isn't working properly? I'm suspecting that the fluid has somehow come out of the heatpipe, leaving just thin copper to conduct the heat. How likely is this? It doesn't appear to be damaged in any way.

Thoughts?
 
I would first try to re-seat the heatsink with some new thermal paste and see if temps come down at all.

If they dont really, you can probably assume the heatpipe has failed. You can usually get a replacement heatsink/fan assembly from ebay for pretty cheap.
 
Yep, it is definitely bad if it isn't transferring the heat down the pipe to the heatsink part.

I have seen this a few times before.

Replace the heatpipe/heatsink assembly and it should start working normally.
 
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