IdeaPad 1 15IGL7 Laptop - Type 82V7 / JS47R&JS57R NM-E791 REV 1.0 no display

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  • hexadecimal
    Member
    • Mar 2015
    • 17
    • turkey
    #1

    IdeaPad 1 15IGL7 Laptop - Type 82V7 / JS47R&JS57R NM-E791 REV 1.0 no display

    i found error at 3.3v regulator and i changed..
    cannot have any schematics..

    board have 1.20v 1.00v 3.3 - 5.1v all ok
    charging led orange
    power on
    bios is ok and tried new
    no display
    Tags: None
    • rediii
      h???, spurrrn
      • Mar 2018
      • 485
      • somewhere in europe
      #2
      Re: IdeaPad 1 15IGL7 Laptop - Type 82V7 / JS47R&JS57R NM-E791 REV 1.0 no display

      check ec rom, does the board have soldered ram?
      Last edited by rediii; 02-04-2023, 07:52 AM.

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        • Sephir0th
          Badcaps Legend
          • Oct 2020
          • 1260
          • Germany
          #3
          Re: IdeaPad 1 15IGL7 Laptop - Type 82V7 / JS47R&JS57R NM-E791 REV 1.0 no display

          The voltages you have shared are not enough to get the clue. what about the rails related to the CPU? Especially +VCC_SA +VCC_CORE

          There is no point to mess with BIOS if rails are missing.
          FairRepair on YouTube

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