HP Envy 17-da0013dx - no POST, 5 caps lock blinks then power off

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  • survivalbloke
    Badcaps Veteran
    • Aug 2021
    • 312
    • United States
    #1

    HP Envy 17-da0013dx - no POST, 5 caps lock blinks then power off

    I want to ask here before I tell my customer that their 1 year old laptop needs a board.

    Model Info:
    HP ENVY 17-da0013dx
    SN: CND4440NCZ
    Prod: 9S1R7UA#ABA
    Board: LA-N482P Rev: 1A

    Symptom: Pressing the power button, the power light comes on. A couple seconds later the caps key show 5 long blinks, then the power light goes out and the machine is off. During this time the current draw is ~1A. The fans will run, and the CPU gets warm.

    I've tried reseating RAM, using known-good RAM, power draining EC reset, manually flashing a clean BIOS image from HP. I understand this fault could be a RAM problem, a board problem, or a BIOS problem. Does anyone have thoughts or experience on this? It just seems outrageous to be a board fault with this being a 1 year old machine.
    Tags: None
    • khaahk
      Badcaps Veteran
      • Dec 2013
      • 827
      • Estonia
      #2
      "manually flashing a clean BIOS image from HP" - you mean by unpacking (copy) bios from hp bios update and write it with external programmer?

        Comment

        • survivalbloke
          Badcaps Veteran
          • Aug 2021
          • 312
          • United States
          #3
          Originally posted by khaahk
          "manually flashing a clean BIOS image from HP" - you mean by unpacking (copy) bios from hp bios update and write it with external programmer?
          Correct. I had another HP laptop here which was a couple years older than this one, and it clearly had a BIOS problem, so before investing the time in taking apart the new BIOS file and copying in DMI, I just flashed it clean to se if the machine would boot - and it did, just didn't have any DMI. That was the approach I took on this newer one as well, I just flashed a clean HP BIOS image, but the symptom stayed exactly the same.

            Comment

            • khaahk
              Badcaps Veteran
              • Dec 2013
              • 827
              • Estonia
              #4
              You can check the ram slot pins for being loose and if you have ram tester to see if there are any unconnected points to cpu - but that means cpu reballing/reflow.

                Comment

                • survivalbloke
                  Badcaps Veteran
                  • Aug 2021
                  • 312
                  • United States
                  #5
                  Originally posted by khaahk
                  You can check the ram slot pins for being loose and if you have ram tester to see if there are any unconnected points to cpu - but that means cpu reballing/reflow.
                  Yeah, I definitely poked each RAM pin on the headers under a scope - All were snug. I also looked inside the headers to check the internal contacts and they were good as well. Well I appreciate the response. re-balling is above my skill level, so I'll just pronounce this machine dead - whomp.

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