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820 2915 no green light

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  • 820 2915 no green light

    Hey,

    This one, no liquid and no signs of corrosion or components knock out!

    I don't have green light!

    PPBUS - 1.3V
    PP3V4S_G3H -3.5V
    SMC_BC_ACOK - 0V

    resistance 27/28 : 21 ohm
    resistance 17/18 : 3.4 ohm

    already replace U7000 2 times same history.. The motherboard already turn on 2 times On! when it turn's on PPPBUS stay on 12.69V.. But after 1 min it goes down!

    any idea?

    thanks

  • #2
    First of all check SMC_RESET_L.
    Post basic voltages of U7000; pins 1, 2, 3, 9, 12, 13, 14, 15, 17, 19, 20, 27.
    Did you try known good DCIN board?

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    • #3
      First thing i did its try a new DC in!

      while i was check the voltages i noticed that voltage on pin 2 was wrong. Common R7005 problem.

      some times we look for the hard things and forget the basics!

      Thank you Mr.while i was check the voltages i noticed that voltage on pin 2 was wrong.

      Thank you Mr.Vali

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