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Dell Latitude 5511 audible electrical noise

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    Dell Latitude 5511 audible electrical noise

    I have a Dell Latitude 5511 laptop, and lately, a faint but clearly audible electrical (crackling) noise comes from the motherboard, similar to the random clicking coming from a mechanical hdd's heads moving inside it.
    The laptop shows no signs of malfunction, and clearly this is electrical not mechanical, so my suspicion goes to a dodgy component in the power rails (a capacitor or a coil?). I fear this could develop into a serious damage.

    Any advise on how to narrow it down?
    The schematic is available here:
    Dell Latitude 5510 5511 - Precision 3551 FDV50 FDV51 LA-J282P Rev1.0 Schematic Diagram https://www.badcaps.net/forum/troubl...2p#post3585122

    Thanks...
    Last edited by SMDFlea; 03-03-2025, 01:41 PM. Reason: Link to schematic

    #2
    pull out hdd,wifi,ram,battery and power up.

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      #3
      Can you explain the point of this? Magic spell?

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