Lenovo G580 La-7982p +VCC_GFXCORE missing

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  • sopik78
    Badcaps Veteran
    • Nov 2013
    • 517
    • Czech Republic
    #1

    Lenovo G580 La-7982p +VCC_GFXCORE missing

    Dear friends,
    I have laptop Lenovo G580 UMA La-7982p with no video on screen. Measured all voltages and found +VCC_GFXCORE missing.
    There is +19V CPU_B+ on PQ907 but no control power on gate from PU901.
    PU901 NCP6132A changed but with no change.
    Can anybody guide me what to check or what control power on PU901 hsould be present to load the PQ907?
    Attached Files
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: Lenovo G580 La-7982p +VCC_GFXCORE missing

      VCC_GFXCORE comes up after BIOS starts to run. So CPU VCore and CPU reset signal have to be present. If they are, try to flash the BIOS.
      Also make sure the display is working and plugged in properly, and the LVDS cable is ok.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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