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LA-H901P +3VALW low resistance what would be the possible damge

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    LA-H901P +3VALW low resistance what would be the possible damge

    I tried to Trace the +3VALW all remove the jumper connections that flows the +3VALW line but same got 70 ohms I already remocve the PJ401 from the PL402 coil. Hope some can guide me what to check next.. home my cpu is not dead or pch maybe?
    Last edited by SMDFlea; 05-01-2023, 06:21 AM. Reason: Added "LA-H901P" to thread title...

    #2
    Re: +3VALW low resistance what would be the possible damge

    schematic

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      #3
      Re: +3VALW low resistance what would be the possible damge

      also my uc7 bios chip pin 8 has 33 ohms?

      Comment


        #4
        Re: +3VALW low resistance what would be the possible damge

        Originally posted by kalilinux25 View Post
        also my uc7 bios chip pin 8 has 33 ohms?
        come on man,do we have to guess what the motherboard model number is
        All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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          #5
          Re: +3VALW low resistance what would be the possible damge

          sorry its a FH50P LA-H901P REV 1A
          Attached Files

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            #6
            Re: +3VALW low resistance what would be the possible damge

            Originally posted by kalilinux25 View Post
            sorry its a FH50P LA-H901P REV 1A
            u dont need to rar pdf

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              #7
              Re: +3VALW low resistance what would be the possible damge

              Originally posted by ktmmotocross View Post
              u dont need to rar pdf
              sorry

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                #8
                Re: +3VALW low resistance what would be the possible damge

                Originally posted by kalilinux25 View Post
                I tried to Trace the +3VALW all remove the jumper connections that flows the +3VALW line but same got 70 ohms I already remocve the PJ401 from the PL402 coil. Hope some can guide me what to check next.. home my cpu is not dead or pch maybe?
                kalilinux25, It may be a possibility that the CPU is damaged because the +3VALW line enters the CPU and the bios is fed with 1.8v, possibly you also have a short circuit in the 1.8v line.
                you separated the line +3VALW from +3VALW. can you measure with respect to mass the +3VALWP line, what value does your multimeter mark in diode mode?

                Comment


                  #9
                  Re: +3VALW low resistance what would be the possible damge

                  Originally posted by albin16d View Post
                  kalilinux25, It may be a possibility that the CPU is damaged because the +3VALW line enters the CPU and the bios is fed with 1.8v, possibly you also have a short circuit in the 1.8v line.
                  you separated the line +3VALW from +3VALW. can you measure with respect to mass the +3VALWP line, what value does your multimeter mark in diode mode?
                  diode mode 0
                  Thanks for the help the pch is already dead confirm after removing the pch chip all shorts gone,

                  Ive learned that if you test the pin8 of the Bio chip it can be easly conclude that shorted pch , great experience.

                  Comment


                    #10
                    Re: +3VALW low resistance what would be the possible damge

                    no need to remoeve chip. inject voltage and u will see hotspot on side of pch/pour IPA on it/

                    Comment


                      #11
                      Re: +3VALW low resistance what would be the possible damge

                      Originally posted by kalilinux25 View Post
                      diode mode 0
                      Thanks for the help the pch is already dead confirm after removing the pch chip all shorts gone,

                      Ive learned that if you test the pin8 of the Bio chip it can be easly conclude that shorted pch , great experience.
                      Very old facts and its known to almost every technician.

                      Comment

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