After I disassembled and cleaned the heatsink my laptop, it shuts down even faster then before cleaning

My Toshiba Satellite P35 laptop is giving me a real headache lately. It shuts down whenever I start using some video editing programs like Adobe Premiere or Ulead Media etc. I know they require a lot of memory that’s why I ordered another GB, now my Ram is 1.5 GB. Nevertheless it continued shutting down that’s when I started reading posts from other users and found out that it’s a common problem with Toshiba Laptops. Yesterday I disassembled it and cleaned the heat sink (to tell you the truth it was really dusty :P ). However today when I tried to turn on the computer it would shut down even when I’m not using any editing software, it shuts down after 5 minutes or so. I am pretty sure I connected everything back as it was before; I double checked every wire meticulously.
I’d really appreciate if you’d give me an advice; I have a couple of video projects to finish soon.

I think it’s possible that you forgot to connect the fan assembly cables to the motherboard. The fan assembly has 2 fans and 2 separate cables that you have to plug in into the motherboard. You can do that only when the system board is removed from the base, there is no access from the bottom of the laptop. I’ve done it myself many times. :P Turn on the laptop and listen if fans are spinning. I believe that both fans have to start spinning as soon as you turn on the laptop. If they not spinning then either the fan assembly is bad or it’s disconnected.
Here’s another suggestion. If you removed the heatsink from the CPU, did you reapply thermal grease on the processor? A few month ago a received a similar email from one guy and he experienced the same problem after he cleaned up his laptop. It happened because he removed old thermal grease, but never applied new grease. He assembled the laptop without any grease between the CPU and the heatsink. The problem was fixed as soon as he reapplied thermal grease.


 

34 Responses to “After I disassembled and cleaned the heatsink my laptop, it shuts down even faster then before cleaning”

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  1. 34
    XmarMalik Says:

    did u apply the thermal paste ?

  2. 33
    LOGIC COMPUTER SERVICES FALKIRK Says:

    3 most common reasons for a laptop to shut down such as described above.. a virus, overheating caused by cpu fan failure, or a dust build up stopping it the fan spinning

  3. 32
    Kelly Says:

    These posts are the closest I’ve found in months to my
    HP Pavilion (dv8220) problem. Originally my power cord
    seemed to be the problem, it kept kicking off and going to the battery (gradually at first, then permanent). I replaced it, same problem. I run the computer with no battery to keep it usable. Battery charges when the computer is off and I use the battery occasionally BUT only WITHOUT the plug in.

    So here’s the real problem, the computer shuts off (no
    warning, no notice on restart, no errors) when I play
    games in full screen with it plugged in (does not shut
    down when it’s battery powered). Been up and down the
    driver route, reinstall OS etc, upping pf, looking for
    directx errors. I see in my Device Manager that “Other
    devices” has the ominous yellow exclamation mark beside SM Bus Controller. Hmmm??

    Any suggestions would be great! Thanx!

  4. 31
    Serg Says:

    I have an HP ze2000 series laptop that just recently started to shutoff for no reason. The fan could be heard and seen working just fine. There was no apparent dust buildup. Took the laptop apart to get to the heatsink too see if there was any dust built up. There was some but not enough to be a problem. Than I remembered between myself and friends talking to HP tech support, the one thing they almost always have you try is powering up the laptop without the battery plugged in. Prior to doing this next step, the laptop was shutting off in less than a minute. And other times working for 20-30 minutes before shutting off. I have been running it now for about 30 minutes with no problems. A bit premature to say I have solve the problem. I am going to let it run on and off for a few days to see if the problem has gone away.

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