Macbook A1278 2011 MC700LL/a 820-2936
No backlight. There was liquid damage on the bottom of the board. L3895 was getting around 4-6 volts.
On the top of the board C3890 was getting the same voltage so I decided to pass 12v from PPBUS_G3H (off C3880). When I did this U3890 seemed to come to life and produced 15v. L3895 went up to 12.5V.
My question is this, I am still not getting backlight. I have BLK_EN (3.04V) and BLK_PWM at U9701. I am thinking maybe L3895 has gone bad?
Anyone else have any ideas? Anywhere else to check.
Thanks for any tip!
No backlight. There was liquid damage on the bottom of the board. L3895 was getting around 4-6 volts.
On the top of the board C3890 was getting the same voltage so I decided to pass 12v from PPBUS_G3H (off C3880). When I did this U3890 seemed to come to life and produced 15v. L3895 went up to 12.5V.
My question is this, I am still not getting backlight. I have BLK_EN (3.04V) and BLK_PWM at U9701. I am thinking maybe L3895 has gone bad?
Anyone else have any ideas? Anywhere else to check.
Thanks for any tip!
Comment