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Dell Precision 7510 intermittent POST failure

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    Dell Precision 7510 intermittent POST failure

    Hello all,

    i have troubles with Dell Precision 7510 board LA-C541P Rev:2.0 A01.

    It didn`t POST and it`s throwing 2amber and 1white code which is CPU failure.

    Sometimes it`s just start working when disassembled and put back again,but with a lot of BSOD when i tried to install W10,sometimes it is working completelly fine unless switched off.

    I tried to make some pressure on CPU BGA socket,but no change of behavior.

    BIOS has been programmed,also BIOS chip was changed and still nothing.

    Not working board just sit for a day or two and when i plug it,it just pass POST and it starts!

    Any ideas please?

    #2
    Re: Dell Precision 7510 intermittent POST failure

    Sounds like SOC issue??

    Comment


      #3
      Re: Dell Precision 7510 intermittent POST failure

      Sorry for late reply,still trying to manage what to do with it...

      Now it just sat for 2 weeks in shelf with other 3 laptops on top and it is working again.

      But when i try to connect with internal wifi it freeze the system almost completely...
      Without wifi connected works fine.

      Any clues please?

      Comment


        #4
        Re: Dell Precision 7510 intermittent POST failure

        So it is probably PCH problem,problems occur on PCI-E and SATA devices..

        Comment


          #5
          Re: Dell Precision 7510 intermittent POST failure

          Thats what i wrote in post#2

          Comment


            #6
            Re: Dell Precision 7510 intermittent POST failure

            Yes,thank you,you had a point.

            Comment


              #7
              Re: Dell Precision 7510 intermittent POST failure

              Hello all,still trying to make this machine work.
              I bought dead board where i found shorted high side mosfet on 1.2V RAM power rail.
              Mosfet removed and replaced,but there is very low resistance (about 5 Ohms,on good board is about 400) on rail leading to memory controller/cpu.
              On RAM power rail there are kOhms now (i removed solder from jumpers to measure power and controller side separatelly).
              Board power LED just blinks for a second and went off.
              Did i missed something or is it game over (dead memory controller/cpu)?
              Last edited by peterzz2007; 08-27-2022, 08:39 AM.

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