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It is most likely a very dirty cooling fan and cpu heat sink. "Hard fix" take the case apart and use canned air to clean and blow the dust out of the fan blades and heat sink blades. Easy fix open one of the small back panels nearest to the fan out flow grill. and lightly blow the caned air towards the vent. Note always hold the canned air can upright otherwise the liquid will come out the nozzle and is very bad for the components Oh and make sure it is off and unplugged good luck
Three reasons a laptop will overheat and shut down:
1. Dust - Dust inside, dust clogging the vents, dust around the cpu and
heat sink. Blow out the dust with a can of compressed air.
2. A Fan not working. Take the laptop apart and replace the fan. Just
put Dell Inspiron 1501 Fan in the seach box on ebay. You'll see plenty
of them at:
3. Thermal Paste around the CPU and Heat Sink has dried up or is too
thin to keep the unit cool. Apply a fresh coat of thermal paste on the
cpu and heat sink. Even if you just change the fan, apply a fresh coat
of Thermal Paste.
Also you can buy a Laptop Cooling Pad at Tiger Direct for under $15. It
plugs into one of the usb ports and the laptop sits on it. It has fans
to keep the unit cool.
Maybe it is overheating and it shuts down so that it does not damage the motherboard.
Three things that will cause a laptop to overheat. 1) Dust - Dust inside the computer, dust clogging the vents, dust around the fans, cpu and heat sink. Remedy - The best remedy is to take the laptop apart and blow the dust out with a can of compressed air. If you don't take it apart you could blow out the vents with a can of compressed air and it might work, but you will be blowing the dust inside.
2) A Fan not working. The laptop will have to be taken apart to replace the fan.
3) The Thermal Paste around the heat sink and cpu had dried up or is too thin to keep the unit cool. Take the laptop apart and apply a fresh coat of thermal paste around the cpu and heat sink.
One sure sign of overheating is that if you immediately try to power the laptop back up, it will not boot. But if you wait awhile and let it cool off then try to boot it up, you can boot successfully until it gets hot and shuts off.
You could also try a Cooling Pad that plugs into the usb port and the laptop sits on it. It has fans to keep the laptop cool. The pad can be purchased for under $20. Try Tiger Direct at: http://www.tigerdirect.com
When the site comes up just type in the search box at the top: Laptop Cooling Pad. When the search results come back sort them by Price Low to High and you will see them starting at $5.99 or so.
Your pc CPU FAN is not working, you need open it and clean fan,, and under fan, on CPU there is termo cream, don't frgot about it, you need clean it and put new termocream. it is nessasary for cool CPU, that Cpu can not be warm.
When the CPU overheats then it will shut down (i.e. thermaloverload) and won't boot up again until it has cooled down. If this is theproblem is not fixed then the CPU will eventually fail. A faulty fan causes the problem or the fan and heat sink assembly are cloggedwith dust. Check the CPU fan to see if it spins freely, if not replace the fan. If the fan and heat sink is clogged with dust the remove the dust and make surethe vents are clear and dust free. Use a can of compressed air to do this.
Use a fan assisted laptop cooling pad for addition cooling.
Usually,, something like this is caused by a heat problem. Things that usually heat up in the laptop are: - the CPU (check the fan, may have to take apart to really clean) - the Video Card (this may have a fan but usually a heat-sink, also may be dirty and full of dust) - the RAM (usually nothing much to do here) - the Hard Drive (this may be the problem but check other things first)
I would check the following forum as they describe how to take it apart for cleaning and also refer to a "build up" of dust in this laptop model. http://www.avforums.com/forums/laptops-netbooks-tablets/1057228-acer-aspire-7720-turns-off.html
Another thing would be to check the BIOS version and also check at what levels the alerts and actions are set.
Also, when using a laptop - do not cover the fan vents which may be underneath.
The fan may be running too slow (faulty bearing) or the fan and heat sink assembly may be clogged with dust.
Check the CPU fan to see if it spinsfreely, if not replace the fan.
If the fan and heat sink is clogged withdust the remove the dust and make sure the vents are clear and dust free. Use acan of compressed air to do this.
I would suggest either taking the laptop in for service to have them remove the case an remove any dust build-up on the heat sinks.
If you're good with a screw-driver, you might try to do the cleaning yourself.
You can't really clean the air vents well without taking apart the laptop.
That sounds like the cooling fan is either plugged up, or it is faulty, or the cooling fins for the CPU heat sink are plugged up with lint and dust. The cooling fan on that toshiba should be accessible through a cover panel under the pc notebook. Remove the cooling fan and use compressed air in a can to clean the cooling fan and the cooling fins to the CPU heat sink and be sure that the air intake vents for the cooling fan are also clean and free of any dust, dirt, or lint. Here are some images that are similar to help assist you, and let me know if you require any further assistance.
Very Very Carefully disassemble the laptop, and clean out the processor fan, and any other "vent" looking things. Lots of times hair (especially pet), dust and other pollutants will clog these, or they may stop working all together, and need replaced.