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820-2838 Charger LED no fan spin

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  • 820-2838 Charger LED no fan spin

    On Q7910 I have 3.3v on pins 3 and 4, but pins 1,2,5,6 are all zero and not shorted to ground.
    It looks like Q7910 is bad, anything else I need to check? Board is pulling 20mA from charger.

  • #2
    Pin3 should be low.
    Read how a P-channel MOSFET works...

    This board doesn't start by itself.
    Use power button, or R5014/15 pads instead.

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    • #3
      Duh, even in red... I missed the _L I was thinking it was P3VS3_EN. I knew some required starting, this is first one I have had. That looks like it makes it easy as it started and pulling 1 amp from charger, The keyboard looks nasty I bet the on off button is not working... Thanks!

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      • #4
        That was it, played around with the ribbon cable on the track pad side and power button started working. I think just going to see if can find a top case, screen looks great.

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        • #5
          Well it gets really hot and resets, didn't think the air had a gpu but I guess the 2010 did.
          Does this have a bad gpu or what else causes it to get very hot and then not finishing booting.
          I was fooled with filevault and got the logon screen but that is only efi, it never seems to complete...


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          • #6
            Getting really hot is a failing MCP more than likely. Check if the MCP is what is getting hot.

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            • #7
              With the one heat sink bar hard to tell and already had it off once, Guess I should of checked it then. I
              guess it goes to the parts bin now. Thanks.

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