[SOLVED]Macbook pro 13 A1278 Dont turn On

[Noguinfor]

Hi guys,

I have a board 820 2936 b, and when i put the charge i have only a green light.

the problem is PPBUS_G3H i have only 3.4v.
PP3V42_G3H is ok 3.5v.

i already sitched isl 6259.. i dont no were to look.. any idea ?

greatings

 

[aprendiz]

Resistance over C7050 and C7020??, voltage on pin 2 from ISL??

 

[Noguinfor]

C7050 and c7020 = 3.3V BOUGHT side. pin 2 = 16.75v

 

[aprendiz]

Ive said "resistance" over C7020 and C7050 not voltage... resistance between pin 1 and pin 2 of each capacitor...

 

[Noguinfor]

C7020 = 19.9 ohm , C7050 = 3.8 ohm.

 

[aprendiz]

Remove F7040 and check if PPBUS_G3H goes high (12.6V), if dont, measure in diode mode pin1 from F7040 and report value, also check that isl is soldered correctly..

 

[Noguinfor]

pin 1 F7040 have 7.1 mega ohm .. i'm soldering a new one .. ty

 

[aprendiz]

PPBUS_G3H goes high (12.6V) when remove F7040???

 

[Noguinfor]

isl bad soldered. i have now 12.8 v but dont turn on yet.. =)

 

[Noguinfor]

i found the problem, bad C6221. tank you very much aprendiz