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Acer Aspire 5749 fan rarely starts

Hi! I own an Acer Aspire 5749 laptop. It's been running perfectly for 1,5 years, warranty is out. Until recently. The fan started to go louder than normal (no problem for me), but a week or so afterwards it stopped working properly! It only goes on sometimes and WHEN IT DOES - the computer works perfectly. But when it doesnt start the computer dies 3-5 min after booting cause of overheating (processor too hot = shutdown?). I have opened up the computer and cleaned the "fan wheel" form dirt and blowed out the "grill" between the fan and outside of the computer from dust. Have i missed anything? The cooling paste(?) is like it should be, is there any other components affecting the fan? What about the copper curved thing, what is that? I am thankful for any help i cna get, i am going downtown to purchase compressed air to do it more properly, but WHY is my fan not starting all the time, when the computer works perfectly when it does?! Usually i have to wait half a day before it suddenly starts and then i can use the computer all the way until i turn it off. The computer is rly hot by then (~80degrees) but the fan is working - so np. If the fan doesnt start the computer shuts down at a way lower temp than when the computer is running with fan (~60<). Best Regards

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  • Master
  • 779 Answers

Buy a replacement fan,

Posted on May 05, 2014

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6ya6ya
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Posted on Jan 02, 2017

IB4G2008
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SOURCE: Laptop keeps shutting down, both fans not working

sounds like you have a bad motherboard, or uP...is this under warranty, by chance?

Posted on May 25, 2008

CodeGuru
  • 95 Answers

SOURCE: start menu opens by itself and keyboard malfunction

Hi quinho_bs ,
Follow these steps :

Step 1, does the laptop gets "heated" before it starts behaving abnormally ??
If your answer is yes , then do not keep your laptop on a soft surfaces like beds or on pillows .Keep the laptop on hard surface (like on desk or on floor)

Step2 , Do you have a updated anti-virus on your system ?
If Yes, then had you ran a full system scan . If no , then please download a free anti-virus software from this link..
http://free.grisoft.com/ww.download?prd=afe

I am sure these 2 steps will help.
Goodluck :-)


Posted on Jun 05, 2008

TampaNative
  • 778 Answers

SOURCE: Crash!!

Could be Heat, sounds like the system is shutting down to protect the processor. Let it sit shut down over night and see if it runs longer when it's cooled down. Is the fan running?

Posted on Sep 05, 2008

  • 50 Answers

SOURCE: Acer Travelmate 290 / 292Lmi freeze on reboot

Try the link . . . www.laptop-problem-solution.com

For find your best solution.


42

Posted on Jul 25, 2009

  • 1 Answer

SOURCE: My laptop freezes after start up.

try disabling wi-fi device.it's probably pci-e if it is built in.i had this problem in my thinkpad t500.when i log without enabling wi-fi.it works great.when i log with wi-fi enabled.it stays about 1 min then freezes.right now i changed power settings for pci-e and now it seems working fine. try this

Posted on Jul 29, 2010

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Start your PC and press F8 several times until the boot menu comes up. Then select "Safe Mode with Networking". Now get some or ALL of the FREE programs below....

Download, Install and Run Malwarebytes Anti-Malware:
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