Laptop suddenly shuts down a lot

By ThanosIsKing
Apr 10, 2012
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  1. Hey Techspot, I'm hoping you can help me out with a little problem I've started experiencing. I got a Lenovo G555 just last year, and everything's been going great with it so far. However, as of about a day ago it decides to start shutting down without any warning whatsoever. It seems that this happens at random also. Some times I can keep the laptop on overnight (I like to have videos playing while I sleep) with no problems, and other times it snaps off after not even 5 minutes. Thus I can't really finish a scan with avast! or malwarebites. I haven't done anything out of the ordinary either. I don't know if it's really overheating because I keep it in a similar environment as my Toshiba laptop that has remained on around the same amount of time with no overheating whatsoever. I'm running Windows 7 on my Lenovo.

    EDIT: I thought that my problem was in fact overheating, so I cleaned the fan area with some compressed air. That seems to help a little bit, but my computer still has a tendency to shut down randomly, just a lot less frequently. I checked the temperature with SpeedFan, and upon startup my core temp is as high as 80C, then cools off to about 60C when I'm doing nothing. The thing that worries me is that SpeedFan can detect no RPMs from my fan. Fan1, Fan2, and Fan3 all show 0 RPMs in the program.
  2. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,684   +153

    Chances are the thermal pads or the thermal paste on the CPU/video chip needs replacing
  3. ThanosIsKing

    ThanosIsKing Newcomer, in training Topic Starter

    I've tried this, but my laptop still shuts down without warning, and again, at random. I've had periods where it shuts down after only about an hour, and other times when it stayed on for up to 3 hours before shutting down.
  4. ThanosIsKing

    ThanosIsKing Newcomer, in training Topic Starter

    I know how to take apart my laptop. What seems to be the issue is that the fan fails to kick in when the temperatures get to this point. It will work for a little while (I can feel the warm air coming out from the grill on the side of the machine) but after a while it just doesn't start anymore.
  5. Blkfx1

    Blkfx1 TechSpot Addict Posts: 879   +170



    Well It looks like you just have a fan gone bad or bad connection from fan to motherboard. Thus your CPU is without proper cooling causing a thermal shutdown. Sounds like a simple solution would be replacing the fan with a new one. Before you do this.. make sure the fan is properly connected to your MOBO like Alen9331 mentioned.


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