please help thinkpad x390 nm-b891 rev 2.0 no display

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  • fredyjbi
    Senior Member
    • Feb 2021
    • 144
    • malaysia

    #1

    please help thinkpad x390 nm-b891 rev 2.0 no display

    please help thinkpad x390 nm-b891 rev 2.0 no display usb type C meter 0.5amp, I have changed and flashed the bios the results are still the same thank you
    THINKPAD X390 NM-B891 REV 2.0

    PL0904 VCCCPUCORE 0.84v
    PL0909 VCCCPUCORE 0.84v
    PL0904 VCCCPUCORE 0.84v
    PL1002 VCCGFXCORE_I 0v
    PL1102 VCCSA 1.05V
    PL1201 VCC1R2AP 1.2V
    VCC2R5A 2.5V
    VCC0R6BP 0.6V
    VCCIO 1.05V
    VCCST 1.05V
    VCCSTG 1.05V
    -PLTRST 3.3V
    -DRAMRST 1.2V

    +1.2V_PG 3.3V
    VCCST_PWRGD 1.05V
    CPUCORE_PWRGD 3.3V​
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    All the measurements looks perfectly fine. Even DRAMRST# is present.
    Since you've flashed bios as well,honestly dont have any idea except checking the pulses on all coils with DSO if that may give a clue.

    Comment

    • fredyjbi
      Senior Member
      • Feb 2021
      • 144
      • malaysia

      #3
      Originally posted by mcplslg123
      All the measurements looks perfectly fine. Even DRAMRST# is present.
      Since you've flashed bios as well,honestly dont have any idea except checking the pulses on all coils with DSO if that may give a clue.
      Thank you sir for your interest in helping me, yes, I myself am confused about where else to go because dram_rst is here

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 14020
        • Canada

        #4
        What is the voltage showing on the Type C meter? Is it 20v?

        Which bios image was used? Have a version 1.0 bios in my database that can be posted for you to test if you wish. Same logic board number.

        Comment

        • fredyjbi
          Senior Member
          • Feb 2021
          • 144
          • malaysia

          #5
          Originally posted by mon2
          What is the voltage showing on the Type C meter? Is it 20v?

          Which bios image was used? Have a version 1.0 bios in my database that can be posted for you to test if you wish. Same logic board number.
          thank you sir for your interest in helping me, type C shows 20v 0.5amp, bios post smd flea I forgot which treatment exactly, sir can I ask for your bios thank you very much

          Comment

          • SMDFlea
            Super Moderator
            • Jan 2018
            • 20695
            • UK

            #6
            Originally posted by fredyjbi
            thank you sir for your interest in helping me, type C shows 20v 0.5amp, bios post smd flea I forgot which treatment exactly, sir can I ask for your bios thank you very much
            Post bios requests in the "Bios requests ONLY!" sub forum https://www.badcaps.net/forum/troubl...-requests-only .Read first https://www.badcaps.net/forum/troubl...before-posting
            All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment

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