Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

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  • pratyush
    Senior Member
    • Sep 2018
    • 69
    • India
    #1

    Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

    No any voltage on PL22 +VGFX_CORE is 0
    IMM_DRAMRST (pin30 ram slot)- 1.3V
    Flashed EC bios
    Plt_rst coming
    Nd at U35 sytem power is ok.
    what should I do?
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

      Do you mean LA-7912P?? Main bios not flashed?? What about Vcore ic?? can be PCH issue also.

        Comment

        • pratyush
          Senior Member
          • Sep 2018
          • 69
          • India
          #3
          Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

          Originally posted by mcplslg123
          Do you mean LA-7912P?? Main bios not flashed?? What about Vcore ic?? can be PCH issue also.
          sorry it is LA-7912p.
          Only I flashed EC bios...
          Vcore IC PU13...
          UGATE1G ND PHASE1G pin31 nd32 not coming...so +vgfx_core is also not present at PL22

            Comment

            • pratyush
              Senior Member
              • Sep 2018
              • 69
              • India
              #4
              Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

              Vcore voltage is present

                Comment

                • mahmoodjavan
                  Banned
                  • Mar 2018
                  • 584
                  • iran
                  #5
                  Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

                  Originally posted by pratyush
                  sorry it is LA-7912p.
                  Only I flashed EC bios...
                  Vcore IC PU13...
                  UGATE1G ND PHASE1G pin31 nd32 not coming...so +vgfx_core is also not present at PL22
                  bios and EC
                  Attached Files

                    Comment

                    • piernov
                      Super Moderator
                      • Jan 2016
                      • 4435
                      • France
                      #6
                      Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

                      Flash main BIOS with a known good one (backup the old first as always).
                      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                        Comment

                        • pratyush
                          Senior Member
                          • Sep 2018
                          • 69
                          • India
                          #7
                          Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

                          Flashed main bios but condition is same

                            Comment

                            • mcplslg123
                              Badcaps Legend
                              • Jun 2015
                              • 7262
                              • india
                              #8
                              Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

                              La-6901P/7912P/Dell N5050-missing GFX core is mostly due to PCH.So if you have tested it with good ram stick, main bios, Vcore IC and then likely PCH issue. If you have Bga rework station, then try changing PCH(Reballing will not do)

                                Comment

                                • pratyush
                                  Senior Member
                                  • Sep 2018
                                  • 69
                                  • India
                                  #9
                                  Re: Q5WV1 LA-9712P rev2.0 Power On bt Black Screen

                                  Thnx for all yr help.

                                    Comment

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