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  1. #1
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    MacBook Pro 2014 magsafe green not fan, video, audio.

    Hello! I'm on a MacBook Pro 2014 the logic board is a 820-3476 The MagSafe turning on the green and turns to orange, the fan does not spin, MagSafe is 60W I have the following voltages on the coils:

    PP3V3_S5 3.35V
    PPBUS_S5_HS_OTHER5 12.65V
    PP5V_S4 0V
    PP5V_S0 0V
    PPDCIN_G3H_CHGR 16.50V
    P5V1_BIAS 5.52V
    P5V1_SW 5.48V
    PPVIN_SW_TBTBST 0V
    TBTBST_BOOST 0V
    DDRREG_LL 0V
    PPDDR_S3_REG_R 0V
    PPVIN_S0SW_LCDBKLT 0V
    PPVIN_SW_LCDBKLT_SW 0V
    CPUVR_PHASE1 0V
    CPUVR_PHASE2 0V

    Where should I begin to look for this defect? Every help is welcome.

    Sorry for the bad English.

    Thank you all
    Last edited by camalau; 08-23-2017 at 01:45 PM.

  2. #2
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    Re: MacBook Pro 2014 magsafe green not fan, video, audio.

    I did not want to erase someone's comment. All "Always-Present" are 12.63V

  3. #3
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    Re: MacBook Pro 2014 magsafe green not fan, video, audio.

    that was me, I realized what a stupid comment it was when I posted it so I deleted it. I don't remember why it was a stupid comment so at the risk of sounding stupid, I'll carry on. I actualyl have one of these on the bench right now that I fixed and I'm waiting for the OK from customer to replace the keyboard as well, so I can use that as a known good testbed for tomorrow if you are online.

    anyhow, I'm like 99% sure that your main rail should be 8.5v, not 12.63, but let's back up for a second; there are multiple different "always on" rails that you need that shouldn't be anywhere close to 12v, like pp3v42_g3h, and ppvrtc_g3h.

    go down the3 list of rails on p65 and check ALL of them, some of them should be the 16v from the wall adapter, some of them should be either 12.5 (I don't think) or 8.5, and others will be 3v

  4. The Following User Says Thank You to riverman For This Useful Post:

    camalau (08-23-2017)

  5. #4
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    Re: MacBook Pro 2014 magsafe green not fan, video, audio.

    Thank you very much for your contribution! The board simply died, I passed a solder flux to replace a transistor, after that capacitors in different places where the sludge went into short, the board simply started to light at various points, in different places burned capacitors and transistors until That MagSafe did not light up anymore, anyway, it's the end!

 

 

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