lenovo P720 SIO flash dump

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  • numerlor
    New Member
    • Jun 2025
    • 4
    • Slovakia
    #1

    lenovo P720 SIO flash dump

    Hi, the SIO firmware flash in my lenovo P720 seems to be corrupted, after a reboot POST fails with CPU1 fan failure and all fans set to max, proceeding with booting shows SIO FW no response.

    I've tried using the lenovo sio update utility but that fails with "EC Autho Value not Match" when the system reboots for the update. The efi update tools has a S04FW.cap file but it's 256kb which seems too small?

    S/N S4PD6489
    Tags: None
    • SMDFlea
      Super Moderator
      • Jan 2018
      • 21081
      • UK
      #2
      post your SIO/EC backup ,even though it`s corrupted
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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        • numerlor
          New Member
          • Jun 2025
          • 4
          • Slovakia
          #3
          Going off of what I found online I've tried it now with a rpi and flashprog and one of those springy clips connected with jumper cables but it just says `No EEPROM/flash device found` the couple times I tried repositioning. Gave up on it after around 10 mins don't want to mess things up further though I suspect I'll have to replace the IC anyway.

          There's some SPI_DBG_HD soldering pads nearby but when I tried continuity with a multi meter I only got beeps on the bios chip that's closer not the SIO.

          I could try reading with a ch341a that I used for my GPU but it's one of the chinese ones that aren't wired correctly for 3.3V so I'm afraid I'd just fry it, and I assume the 1.8V adapter just wouldn't be able to drive it. Soldering iron's not doing great so if I have to solder I'll have to go out and buy something better
          Attached Files

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            • SMDFlea
              Super Moderator
              • Jan 2018
              • 21081
              • UK
              #4
              Originally posted by numerlor
              Hi, the SIO firmware flash in my lenovo P720 seems to be corrupted, after a reboot POST fails with CPU1 fan failure and all fans set to max, proceeding with booting shows SIO FW no response.

              I've tried using the lenovo sio update utility but that fails with "EC Autho Value not Match" when the system reboots for the update. The efi update tools has a S04FW.cap file but it's 256kb which seems too small?

              S/N S4PD6489
              Where did you get the S04FW.cap file from, can`t find it at https://pcsupport.lenovo.com/us/en/p...3-B07A93E0428C
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment

                • numerlor
                  New Member
                  • Jun 2025
                  • 4
                  • Slovakia
                  #5
                  Originally posted by SMDFlea

                  Where did you get the S04FW.cap file from, can`t find it at https://pcsupport.lenovo.com/us/en/p...3-B07A93E0428C
                  The efi zip here Firmware Update Utility (SIO) for Windows - ThinkStation P720 - Lenovo Support US

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