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  1. J

    820-00164 green light orange light no power up

    hi i have a 11" mac book air with green light orange light no power up board looks very clean no previouse signs of work but it may have been cleaned. ppbus_g3h - 8.67v pp5v_s5 - 0v but no short to ground on pp5v_S5 following pp5v_s5 back i assume u7501 creates this this has no 0v onvin...
  2. J

    820-3209 P1V5CPU_EN giving me 3.3v

    Hi i have an old mac book air giving me 3.3v on P1V5CPU_EN I can see it is created from PP3V3_S3_MEMRESET so i can see where it gets it from but i dont see how it is supposed to be reduced. could some one please help i am tired of looking at page 62 of the schematic and not...
  3. J

    820-3437 4v on PPBUS_G3H

    So this board turned up with dead short on PPBUS_G3H turned out to be C7431 PPBUS_G3H then gave a flickering voltage from 8.5v to 4.0v but now only puts out 4v changed U7100 have checked pins 27 and 28 get 20,2 ohms is the next move an SMC change?? or am i missing something
  4. J

    820-4924 no pp5v_s3

    this computer has been looked at before. oh happy day! charger turns green then orange no fan spin PPBUS_G3H - 12.56V PP3V42_G3H - 3.4V PPVRTC_G3H - 3.33V PP5V_S5 - 5.0V PP5V_S4 - 0V DIODE MODE 0.098V PP5V_S3 - 0V DIODE MODE 0.001V PP5V_S0 -...
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