Computer shut down after on startup

R

Radicalapple

New Member
My problem is pretty serious.
My laptop starts to shut-down completely during startup. With mains power supply, it shuts down just before the Windows XP logo comes on, then it just shuts down: no bluescreen, just blacks out and it shuts down. With battery, it lasts longer and I cound just enter my password for Windows, then same thing happened.

One thing is, before it shuts down, the fan starts spinning frantically, which should not happen because I just turned it on for 5 seconds and it should not be hot. I tried disconnecting the fan but same thing happens (except the fan did not spin, of course)

My laptop is quite old, so dust may built up. Could there be a short-circuit somewhere?

Please help, reply if you have any idea about what is wrong. Thanks

Note: some people may ask what I mean by shuts down, it is not a simple black screen, it is if u disconnect the power supply, and everything was gone in a click. No messages of error
 
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Overheating will cause the laptop to completely shut off. If your laptop is that old, you may very well have a lot of dust build up inside.
 
are you sure it is caused by over-heating? Because if you are right, the CPU over-heats after 4 seconds being started, which sounds ridiculous. So should I use a powerful fan to test if it's really over-heating issue?

Also, is there any place other than the heat-sink that I should clean?
 
With the laptop off, take a can of compressed air and blow it in the vent holes. You could have other issues why its overheating as well.
 
Buddy computer shut downs because of an error occur in your operating system. Try re installing your windows and start your computer again. I think this will work.

Thanks
 
This behavior is typically due to overheating.

If the compressed air does not help, most likely you need a thermal grease between the CPU and heatsink replaced. The performance of the thermal grease may degrade over time (at least with certain thermal compounds; the one used in certain old HP models required a replacement in about a year or two).

The exact procedure depends on the model of the laptop. You should google up a service manual for your particular model; I would not risk disassembling it without a manual because the latches can sometimes be quite tricky and easy to break.
 
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