Acer G257HL main board short circuit

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  • mc4ren
    Member
    • Jul 2019
    • 37
    • Basque Country

    #1

    Acer G257HL main board short circuit

    This IPS LED monitor has the AC adapter apart, so it only receives 19 Vdc from the input jack. There is a short in the board already seen in the input jack. I've checked most capacitors, mosfets and diodes, and they seem to be fine.
    I'm a bit lost. It's hard to follow the power lines and especially as I find continuity in so many parts. Evern removing mosfets, the short continues.
    I used a thermal camera and the capacitor in the yellow circle was getting hot instantly. Removing it still kept the short, so the capacitor was just the victim, not the guilty.
    There is a component that I can't identify, and that's marked in the red circle in the right. It reads AHH5BC but I couldn't find anything about it. It doesn't behave as a mosfet, actually the pads are not those of a mosfet. Any idea what this could be?

    Thank you all in advance!
    Attached Files
  • mc4ren
    Member
    • Jul 2019
    • 37
    • Basque Country

    #2
    Re: Acer G257HL main board short circuit

    Ok, after a week looking for it, I just found it when I posted!
    https://cdn.badcaps-static.com/pdfs/...b2ebcd6091.pdf
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