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[SOLVED]820-3115-B, No Chime, No Display, Fan Spins Faster and Faster

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  • [SOLVED]820-3115-B, No Chime, No Display, Fan Spins Faster and Faster

    A1278 2012 820-3115-B motherboard reported liquid damage. Board looks visibly OK, no corrosion that I see. I get a green light on the charger, and the fan spins normally for 10-20 seconds, then starts spinning faster. No chime, and no display. Bad SMC perhaps?

  • #2
    CPU Vcore present?

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    • #3
      ppvcore_s0_cpu is short to ground

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      • #4
        1.12V on diode mode.

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        • #5
          I asked if voltage is present, not diode mode.

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          • #6
            Sorry duke, terminology brainfart, I'm getting a solid 1.12V on ppvcore_s0_cpu

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            • #7
              Could be anything, really need the history. I doubt this "just" happened.

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              • #8
                I ran this one through another ultrasonic cleaner. It still exhibited the same symptoms, get a green light, and the fan begins spinning faster after 20-30 seconds. I installed it back into the laptop, and miraculously turns on and functions normally, with fan spinning at normal speed. You can mark this one as solved I suppose, though not sure what fixed it. Thank you.

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