Dell 5559 La-d071p

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  • nashdumur
    New Member
    • Feb 2016
    • 7
    • Mauritius
    #1

    Dell 5559 La-d071p

    Hello guys, I am working on this board but this one had a short on 5vs rail, so I found the following component short and replaced:
    1. PU102
    2. UZ2
    3. PU603
    4. PU605
    5. HDA27

    Now the led white for 1 second and off, only 5valws/3valws present. vr_on and slp3 is 3v active for 1 second and goes off.
    Replaced bios chip from a donor board, now fan spins up. After solid white led goes off no display coming.
    Does anyone has solution for this problem or did I miss something or did something wrong? Any help from you guys is very much appreciated.

    *****
    Tags: None
    • nashdumur
      New Member
      • Feb 2016
      • 7
      • Mauritius
      #2
      Re: Dell 5559 La-d071p

      Changing bios chip keeps power stable, vr_on and slp3 active but no output voltage on vrm even after replacing pu603. With original bios vrm gets around 1v for a fraction of a second and goes off as slp3 went off. Any advice?

      Attached schematics for reference.
      Attached Files
      Last edited by nashdumur; 05-13-2018, 10:19 AM.

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