Caps and num lock blink 4 times

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  • AdrenalinTL
    Senior Member
    • Apr 2024
    • 57
    • test

    #1

    Caps and num lock blink 4 times

    I am sitting with a very similar issue.

    Basically, had a probook that worked, gave it to someone, they returned it DOA. what the heck happened, I have no idea.

    Caps and num lock blink 4 times, as per HP, thats a board failure. I am very new to this, so perhaps I should be posting a new thread?

    Anyway, I resoldered the bios chip on after trying EVERYTHING else including reseating ram, cpu etc.

    Multimeter shows 19.5V on power, so I presume thats correct. Fan spins, no display. No post. Bios chip looks good from what I can tell just not sure how to test if it's faulty? Haven't got that far in my very newly acquired studies as yet.

    Saw a youtube video (Very blurry) of a indian guy using copper wire to do something odd.

    https://www.youtube.com/watch?v=hOMoTpC8Nx4 <<< here. My HP is doing EXACTLY the same including the same lights when plugging the power in.

    Anyone got any other ideas?
  • SMDFlea
    Super Moderator
    • Jan 2018
    • 20758
    • UK

    #2
    Whats the laptop model number and the motherboard model number ?
    All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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    • AdrenalinTL
      Senior Member
      • Apr 2024
      • 57
      • test

      #3
      HP Probook 450G1

      Rampage 12241-1 - Same as the OP's.

      EDIT : I've also ordered a BIOS re-programmer, as that's what most people have done and it has come right. I honestly do not see how something works the 1 day, and then completely fails the next. The lady I gave it to must have tried to update the BIOS or something and turned it off half way through or something.

      Comment

      • loopster
        Senior Member
        • Sep 2020
        • 76
        • Germany

        #4
        I resurrected an HP 8570w with a corrupted BIOS just a few days ago which had failed to come out of standby.
        Device came on, no boot logo, fan ramping up, no sceen output, 5 blinks on caps lock and amber lights on wifi and volume button.
        All voltages checked okay, Bios recovery did not work, so I desoldered the chip and flashed a known good one with a programmer. UEFI BIOSes are weird sometimes,
        especially HP... :-)

        Comment

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