Hi Macbook wont turn on fan just on and off ,have green light on charger ,
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Macbook Pro 13 A1278 EMC2555
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Re: Macbook Pro 13 A1278 EMC2555
try making a SMC AND/OR PRAM reset first of everything , then let us know , in case you dont know how to do it
SMC reset require no power on board , no battery and dc attached to machine , for 40 second , during this time press a few times on off button .
pram reset - press command + alt +p +r and keep pressing does keys while you press on off , keep the keys pressed , once you hear the reboot and second chime noise , release all keys .
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Re: Macbook Pro 13 A1278 EMC2555
I have the similar problem, same board...
It came with PPBUS_G3H shorted to GND at Q7035.
I have changed Q7035 ang got green light and fan as well.
But unfortunately I have no display, chime, anything...
Also tried to power on without RAM and it runs in same way, no beeps...
When I plug the charger with battery inserted, green light go off after couple of sec and no orange light came on. So I have SMC_BC_ACOK at U6901 without battery and not with battery connected.
I tried with changing U7000 - same...
On BIOS i have 3.3 at pins 1,2,3,7,8.Last edited by cvorke; 04-28-2016, 11:28 AM.
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