My PC restarts automaticaly.

December 5, 2010 at 03:30:56
Specs: XP-SP2, p4/1 Gb
It shows warning as CPU fan error, whilw it get fixed by pressing f1 key. CPU temperature also being 118 degree centigrate. plz help

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#1
December 5, 2010 at 05:46:11
It is shutting down to protect itself from overheating & burning out.
Is this a laptop or desktop system? Have you done anything to clean out the CPU fan/heatsink? The fan might have failed. The thermal compound between CPU & Heatsink might have baked and lost thermal conductivity. 118Deg C is way too hot.

Goin' Fishin' (Some day)


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#2
December 10, 2010 at 09:16:49
hi Richard thanks for the reply.. Acly i already have changed the fan and also did the cleaning job... sometimes it shows a blue screen and gives some error messages like page_fault_in_nonpaged_area.. etc..etc..
i suspect some times it as a OS problem or it may be some virus issue..
I am using kaspersky antivirus and also used some of the tools to clean the Registry, but the problem is still there... I am trying my best to fix the problem on my own, so need some guidance.

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#3
December 10, 2010 at 12:52:47
Shutting down and restarting is the classic symptom of overheating and that is probably all it is. Follow the advice given in #1 and forget about OS problems or viruses until you've got that temperature down. If you've done everything else given then you need to refit the CPU & heatsink joint. If you don't attend to it you might need a new CPU and the crashes could corrupt the software.

Registry fixing programs often create more problems than they fix - avoid them. Software will not fix a hardware problem.

We all live on a ball.


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Related Solutions

#4
December 10, 2010 at 16:23:29
Did you reapply a small amount of thermal paste ?

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#5
December 10, 2010 at 17:24:11
This should help:
http://www.maximumpc.com/article/ho...

We all live on a ball.


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#6
December 11, 2010 at 08:40:57
thanx a lot derec... Btw can you guide me, dat wat shud be the optimum temperature ???

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#7
December 11, 2010 at 09:44:02
118 degrees C !
Your cpu may already be damaged !

"The thermal compound between CPU & Heatsink might have baked and lost thermal conductivity."

I have encountered many cpu installations where the thermal compound had hardened, but that DID NOT affect the thermal properties significantly.
If the heat sink is not loose on the CPU when you unclamp the heat sink, don't mess with it !

"i already have changed the fan and also did the cleaning job.."

The CPU fan must be suitable for the CPU - be able to move enough air to cool it properly. If the original fan came in a boxed set with the cpu, it's adequate - if it didn't, it may NOT be !
The CPU fan MUST blow TOWARDS the heat sink ! You should see the entire fan blade from the top when it's installed the right way, no support rib(s) ontop or non moving part in the center.
The new cpu fan must be able to move at least much air as the old fan, if the old fan was adequate when it worked ok - if it's the same physical size, the ma or wattage rating should be the same as the old one or higher.

If you removed the heat sink from the CPU...
- the heat sink MUST be installed such that it's flat ontop of the cpu.
On a desktop computer, it's difficult to see well enough at the bottom of the heat sink to determine that when the mboard is inside the case.
- you MUST use one of a thermal pad, thermal compound, or thermal grease between the heat sink and the cpu. You scrape off the old thermal pad or thermal grease or thermal compound before installing new of any of those, although you can re-use thermal grease if it's clean. Thermal grease - pure silicon compound, whitish, translucent, almost clear when in a thin layer - never hardens.


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#8
December 11, 2010 at 11:43:24
Re #6.

There is not really a stated optimum but I would regard 90F as fine and 100F cosy but acceptable. This is just my opinion but if you google around there is plenty of information (mostly in deg C so have your conversion handy).

Deg F = 1.8 x Deg C +32

We all live on a ball.


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#9
December 11, 2010 at 12:32:41
You can look up the max running temp (beyond which the cpu is likely to "misbehave") and the absolute max temp (beyond which the cpu is damaged) on the Intel web site if it has an Intel cpu, or on the AMD web site if it has an AMD cpu.
If you have an AMD cpu it may already be damaged.

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