The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    980m MXM shorts power supply

    Discussion in 'MSI' started by johnbb, Aug 20, 2018.

  1. johnbb

    johnbb Notebook Consultant

    Reputations:
    54
    Messages:
    268
    Likes Received:
    85
    Trophy Points:
    41
    Hi fellas,
    A friend of mine burnt a component on his GT72 motherboard while changing the battery for a new one.
    As the mobo is gone, he offered me his 980m gtx, which is in perfect looking condition. I tried it on my GT70 and on a Clevo P170EM and both PSU were short (LED turns off on the PSU as soon as you press the PWR button) and obviously nothing happens.
    Any thought on what's happened to the GPU? Did it fry along with the mobo? Most probably...
     
    johnbb, Aug 20, 2018
    #1
  2. Falkentyne

    Falkentyne Notebook Prophet

    Reputations:
    8,396
    Messages:
    5,992
    Likes Received:
    8,633
    Trophy Points:
    681
    How in God's name did he burn a component by changing the battery??

    isn't the battery on a GT72 *external*?
     
    Falkentyne, Aug 20, 2018
    #2
  3. hacktrix2006

    hacktrix2006 Hold My Vodka, I going to kill my GPU

    Reputations:
    677
    Messages:
    2,181
    Likes Received:
    1,421
    Trophy Points:
    181
    If the GPU is causing a short normally means the GPU is the issue to which I would say look at the resistor's / caps etc, also how the hell can one fry a gt72 mobile in a battery change it's an internal battery that uses a Plug.



    Sent from my SHIELD Tablet K1 using Tapatalk
     
    hacktrix2006, Aug 20, 2018
    #3
  4. johnbb

    johnbb Notebook Consultant

    Reputations:
    54
    Messages:
    268
    Likes Received:
    85
    Trophy Points:
    41
    I honestly dunno how the hell he fried everything... He told me he forced a bit to plug the battery in and when he started the laptop litteraly caught on fire!!
    I'll post a close shot of the burnt component on the MB so I know exactly the part number and if it is possible to repair it.
    As far as the GPU is concerned, I checked it thouroughly and there is absolutely no visual clue whatsoever indicating a failed component/resistor.
     
    johnbb, Aug 21, 2018
    #4
  5. KuroSan

    KuroSan Notebook Enthusiast

    Reputations:
    3
    Messages:
    38
    Likes Received:
    4
    Trophy Points:
    16
    sounds to me like a dead mosfet - the three parts on the upper edge of the card. you can measure the resistance on the lower right edge of the card. between the 2 big pins on the right side with top view.
    if you have an unusual reading of a few ohm one of the mosfets is burned.
     
    KuroSan, Aug 21, 2018
    #5
  6. Darker01

    Darker01 Notebook Consultant

    Reputations:
    46
    Messages:
    118
    Likes Received:
    81
    Trophy Points:
    41
    My busted GTX 980M shorted the PSU as well. You can go through the diagnostic steps I used to see if it's a dead MOSFET.

    http://forum.notebookreview.com/threads/broken-gtx-980m.810697/
     
    Darker01, Aug 21, 2018
    #6
  7. johnbb

    johnbb Notebook Consultant

    Reputations:
    54
    Messages:
    268
    Likes Received:
    85
    Trophy Points:
    41
    Thanks a lot. I'll follow your tutorial. But I must admit I'm not too confortable with electronics...
     
    johnbb, Aug 21, 2018
    #7
  8. johnbb

    johnbb Notebook Consultant

    Reputations:
    54
    Messages:
    268
    Likes Received:
    85
    Trophy Points:
    41
    Resistance across power pins is 5.8 Ohm
    Resistance across the 3 R22 coils is around 1Ohm and across R56 is 1.2Ohm
    How do I know if a MOSFET is gone?
     
    Last edited: Aug 25, 2018
    johnbb, Aug 25, 2018
    #8