HP Omen 15 DAG3DBMB8D0 strange 3V power rail

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  • javieromex
    Senior Member
    • Apr 2016
    • 76
    • México
    #1

    HP Omen 15 DAG3DBMB8D0 strange 3V power rail

    Hello

    I have this behavior on the 3V rail (PL101 capacitors side) (See attached image and Boardview).

    -I thought it was the 3V IC and I changed it and it's still the same.(PU101)

    -I injected 3V into the 3V coil and the PCH got hot (very slightly, 170mA). I removed US4 and the 3V power rail stabilized (3.3V stable) so I changed the PCH but it's still the same after replacing PCH. (Also replaced US4)

    -The enable of the 3V rail (3VS5EN) is following that pattern to.

    -The 3V LDO (+3VPCU) is stable.

    -I measure the KBC power voltages and non of them have the same behavior.

    Any recommendation? Thanks

    [Mod. Edit] Boardview -> https://www.badcaps.net/forum/showth...95#post1282795

    Reminder: rules and organization of this section
    https://www.badcaps.net/forum/showthread.php?t=117483
    Attached Files
    Last edited by Vesko356; 10-22-2023, 03:56 AM. Reason: Attached boardview removed and replaced with link.
    Tags: None
    • javieromex
      Senior Member
      • Apr 2016
      • 76
      • México
      #2
      Re: HP Omen 15 DAG3DBMB8D0 strange 3V power rail

      The osciloscope yellow channel shows 2A per division but its actually 2V...

        Comment

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