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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...
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...
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