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please help friends thinkpad T470 error post "bottom cover tamper detection error"

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    please help friends thinkpad T470 error post "bottom cover tamper detection error"

    please help friends thinkpad T470 board CT470 series NM-A931 error post "bottom cover tamper detection error"
    I've already
    flashed the bios clean me and updated from the Lenovo site, then removed the switch and immediately jumped the S3 from pins 1 to 4, 2 to 3 but the problem remained the same, thank you
    Last edited by fredyjbi; 06-15-2024, 10:00 AM.

    #2
    INTRUDER# netname has a '#' as a suffix. In the digital logic world, the hash-tag suffix denotes that the signal is active LOW. That is, if this line is ~0v = logic low, then the signal is active. So if 0v, INTRUDER alert.

    Respectively, remove the short applied between S3 pins 2-3. This will remove the hard short to ground and then the pull-up resistor (R646) on the same signal will be parked to the logic '1' state. Test again.

    Comment


      #3
      Originally posted by mon2 View Post
      INTRUDER# netname has a '#' as a suffix. In the digital logic world, the hash-tag suffix denotes that the signal is active LOW. That is, if this line is ~0v = logic low, then the signal is active. So if 0v, INTRUDER alert.

      Respectively, remove the short applied between S3 pins 2-3. This will remove the hard short to ground and then the pull-up resistor (R646) on the same signal will be parked to the logic '1' state. Test again.
      Sorry sir, I am late in giving an answer, sir, I have removed the pin 2 to 3 jumper, and also replaced the R646 resistor but the results are still the same, thank you and where should I check again
      sw3
      pin1 3.3v -INTRUDER_PCH
      pin2 3.3v
      pin3 3.3v
      pin4 0v

      D5
      pin 1 3.3v
      pin2 3.3v -INTRUDER_EC
      Last edited by fredyjbi; 06-16-2024, 07:51 AM.

      Comment


        #4
        The logic levels look correct to me since the parked state is a logic '1'.

        Review the BIOS settings under SECURITY to see if this setting can be disabled.

        Some Lenovo ThinkPad notebook systems contain a mechanical tamper detection switch - Lenovo Support US

        Comment


          #5
          Originally posted by mon2 View Post
          The logic levels look correct to me since the parked state is a logic '1'.

          Review the BIOS settings under SECURITY to see if this setting can be disabled.

          Some Lenovo ThinkPad notebook systems contain a mechanical tamper detection switch - Lenovo Support US
          thank you sir for your help, yes this case is very strange sir still the tamper error, I have checked the bios security position is disabled, thank you Click image for larger version

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            #6
            I think the EC chip (Embedded Controller,MEC1653) may have a soldering defect.
            Place the motherboard steadily,and try heating the EC chip with a heat gun to 230°C for 1 minute.Then let it cool down naturally.

            Or you can also consider replacing the chip.Note that this chip has a built-in program. Please make sure that the spare part also has a program.

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