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    Clevo M77sx, Fan Do Not Turn On When Power On Process, Sometimes It Is Booting, Cpu And Gpu Getting VeryHot,Voltage on FAN 0,5V ?

    Discussion in 'Sager and Clevo' started by notebookreview2012, Jan 6, 2012.

  1. notebookreview2012

    notebookreview2012 Newbie

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    Hello GUYS,

    i have some issues with my new latop which i bought it from ebay as used.

    Model: Clevo M77S 17"
    mainboard nr: nkm770su8k00209
    6-71-m74so-do4.gp

    Sometimes the laptop turns on and boot into windows.
    But sometimes it is not booting.

    I opened the Notebookcase and controlled the Fan.
    The Fan do not turn on. I measured the voltage on the red and black pin when i push the power on keytop and leds lights up and dvd is searching...i measure only 0,5Volts. I think the fan need 5Volts ?

    Why do not the fan starting to run during the power post process?

    The cpu and gpu getting very hot, but i shuted the notebook down to not burn it.

    is it possible that the guy flashes the wrong bios or this bios do not turn the fan on ?

    Would be happy if you have some information for me to solve the problem?

    might be that i reball the gpu? i am confused why the fan do not goes on during the power on phase ?
    TIA
     
    notebookreview2012, Jan 6, 2012
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  2. notebookreview2012

    notebookreview2012 Newbie

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    Okay Guys,

    i disassembled the notebook again and found out that the notebookcase
    fits not rigid in the case. The Mainboard is round a bit 200 mm x 200 mm small and placed into the left corner of the bottom-case which is 450 mm x 300 mm case, i mean a lot of space from the mid to the right side. The Mainboard is only half size of the case is..

    You twirl the case on a easy way if you press on the bottom right corner of the notebook, you can see that the upper left corner of the notebbook mainboard moves a little bit.

    Exactly on the upper left corner is the power supply whre the 19 V jack is.
    I am thinking that one smd part in the powersupply has not full contact to the motherboard. I found also out that 20 mm from the power input is mounted a 10 x 10 mm^2 chip it is called SC452-0828-CC12488-1.
    Is this the powerswitch or maybe the Bios?
    I do not know, but it seems that in the moment of moving the Notebook (not softly) the notebook fries and reboots.

    At the moment i assembled it fix and the Notebook starts when i press 2-5 times power-key.
    That means that something of the soldered parts or part loose the contact.

    Should i catch may fan-heater and try to heat the power area up?
    To resolder, i know that i am a rookie.
    Yesterday i rund windows xp on it and start 3 times the 3dmark06 benchmark programm to look if the problem lies on the GPU-Craphic card. But it runs very well the fan colled the cpu and gpu not over 63 GRAD CELSIUS, the processor was round about 55 Grad Celsius.


    I mean when it runs it runs whitout problems. But when i sut it down and the notebook cools down and then i try to start again it is possible that i need 2-6 times to boot this machine.

    I would be happy when you guys out there would give me a idea?

    Or should i dissassemble again and makes some pictures.
    TIA
     
    notebookreview2012, Jan 8, 2012
    #2