my laptop usually shutdown after 1hr and the bottom of the laptop as well as the keyboard also get heated very much. once it has been repaired and i was told that the problem is due to exhaust fan not working properly and at that time it was repaired but after few days still the problem exists, so plz help me out as now i have decided to repair it by myself.

If you have acpi installed. You can check out fans and such with

If you have lm-sensors installed you can also check out fans with

If your laptop was repaired and now shows the same symptoms it was not repaired properly. Instead of trying to fix it yourself I would go back to the service people and demand a proper repair.

it was repaired 3 months ago an before that also there was same problem and the thing is that every time i went to them they just repair it and they charge for it , in fact they even don't tell about the problem, but this time i managed to know about the problem thats why i hav thought to repair it by myself becoz when they repair it works fine for 2-3 months but after that again same problem arise.....

Then you should change your service people. Seems to me that they don't know what they are doing (or they know but want to betray, who knows).
But anyways, if you decide to repair it yourself you should know what actually causes the overheating. Without knowing that, and also a bit of dexterity, you shouldn't begin.
What do you think is the problem?

Dear tobiSGd,
i was told about problem in exhaust fan as while working when i put my hand near it, i can't feel any warm air to be blown from ther also when i switch on my laptop a sound comes from there like something is not working properly.....thats why i thought that i should repair it my self as being a hostler i have spend a lot of money even out of my budget and thats why now i have thought to repair it by myself.........and the service people to whom i have approached to repair my laptop are recognized service people in the market and many of others service people where not even able to find out the problem.

It sounds like you deserve the experience of opening your own laptop. I wish you luck. You will need it. Check for bearings, try to lubricate them and check the blades of the fan are not hitting things. I would not be leaving the laptop on until the heat becomes a huge problem, as that sort of temperature cycling is destructive for the silicon.

Hi there

May I suggest:

.Search the laptop manufacturer's www site for a service manual that includes full dis-assembly diagrams for the laptop in question
.obtain the relevant tools
.dismantle the laptop (very very carefully) as indicated in the service manual
.perform a detailed clean of the unit, and ensure that all airways, heat sinks, etc are clear of dust and debris
.ensure that the heat spreader (heat sink) assembly is securely attached to the CPU
.check that the exhaust fan works
.reassemble the unit and re-test

If that fails to solve the problem then you may like to consider replacing the heat conductive heat spreader pad between the heat spreader (heat sink) and the CPU (order one as a spare part from the laptop manufacturer (or alternatively replace the pad with suitable heat sink compound (not the preferred option)) to improve the transfer of heat from the CPU to the heat sink.

Ensure that you are not operating the laptop at the top end of it's operating range for temperature and relative humidity for long periods. This may result in problems.

You might like to consider using an active laptop cooler pad that sits under the bottom of the laptop if the laptop has ventilation gaps in the case bottom; this MAY improve airflow significantly.

Typically most problems with cooling that I have encountered fit into one of the following categories:
1) heavy dust contamination
2) worn out or defective exhaust fans
3) poor heat conductivity between the CPU and heat spreader assembly
4) in the case of a few manufacturers - BIOS fan control issues
(some laptops require some Windows OS support to control the operation of the internal exhaust fan, and don't play happily with some Linux Distros) - Try Goggling the issue for your laptop manufacturer, model, and Linux distro. There have been some very good creative solutions for getting round some of these problems (especially fan switching on/off temperature thresholds) over the years.

Important:
Do NOT perform internal maintenance on your laptop if you are unsure what you are doing, or if you lack confidence, or skill in this area. It might be more appropriate to seek another more reputable repairer rather than render your laptop ruined by your own efforts.

Hope that assists

C.

1 members found this post helpful.

@DISCOVER VISHWA: you have already reported two of the posts above. Did you really have the purpose to report them for some obscure reason or did you simply clicked on the report button by mistake? If you want, you may contact me by e-mail for clarifications. Thank you.

sorry it was done by mistake and i have repaired my lappi n now its working properly thanks to all for ths support.

thanks to all i have successfully repaired my laptop and now its working properly, thanks again to all for their support. once again thanks to all