wirelessplanet
Member
Client brought in a macbook - 820-00928 that wasn't turning on.
It takes in 20V .1A- .8A fluctuating on all 4 ports
Liquid damage on U3906 area
No Voltage on Big coils
Cleaned up corrosion
Lifted U3906 removed corrosion.
With a new known good battery it takes 2-3A - cpu doesnt get hot
PPBUS_G3H is present
PP3v3_SUS is present
CPU Lines not present / 2OHMS to ground
SMC Reset/Bypass made both fans spin at max w/ new battery but no display
Seems like its trying to turn on but cant complete the sequence
It takes in 20V .1A- .8A fluctuating on all 4 ports
Liquid damage on U3906 area
No Voltage on Big coils
Cleaned up corrosion
Lifted U3906 removed corrosion.
With a new known good battery it takes 2-3A - cpu doesnt get hot
PPBUS_G3H is present
PP3v3_SUS is present
CPU Lines not present / 2OHMS to ground
SMC Reset/Bypass made both fans spin at max w/ new battery but no display
Seems like its trying to turn on but cant complete the sequence