Macbook A1502 820-3476

[Instafixx]

Hello Namaste,

This Macbook came in. It was heating up and not booting. There was light on the charger but no boot.

Macbook was extremely dirty. Cleaned it a little and it started working fine. So we unscrewed the board and cleaned both sides of it.
Post that it booted once and then i just got a fan spin and no boot. Got green/orange light on the charger as well.

Did an SMC Reset and the machine switched on. We thought there may be crap under the SMC. So took the board out . As soon as i connected the charger a component burned out in I/O board. I replaced that component. Now the light is gone for good. Getting PP3v42 and PPBUS_G3H as normal.

I tried using another I/O board and the same component got burned again.
I am so stuck.

PPBUS_G3H is at 12.6
PP3v42 is at 3.4

No light on the charger.

[dellxps15]

Re: Macbook A1502 820-3476

what component keep getting burned ? post picture. also when burned with io cable connected check if that component is shorted.

[Instafixx]

Re: Macbook A1502 820-3476

Hello Namaste,

This Macbook came in. It was heating up and not booting. There was light on the charger but no boot.

Macbook was extremely dirty. Cleaned it a little and it started working fine. So we unscrewed the board and cleaned both sides of it.
Post that it booted once and then i just got a fan spin and no boot. Got green/orange light on the charger as well.

Did an SMC Reset and the machine switched on. We thought there may be crap under the SMC. So took the board out . As soon as i connected the charger a component burned out in I/O board. I replaced that component. Now the light is gone for good. Getting PP3v42 and PPBUS_G3H as normal.

I tried using another I/O board and the same component got burned again.
I am so stuck.

PPBUS_G3H is at 12.6
PP3v42 is at 3.4

No light on the charger.

Update

I reballed the SMC and the Machine boots up fine and works well. But there is no light on the charger and I am getting "Battery Not Charging " message when clicking on the battery icon.

What can be the issue?

[mon2]

Re: Macbook A1502 820-3476

Check the smbus lines on the battery connector. What is the voltage to ground of these pins?

[Instafixx]

Re: Macbook A1502 820-3476

Check the smbus lines on the battery connector. What is the voltage to ground of these pins?

Hey,
Thanks for the help. Turns out the component installed on the I/O board was faulty. Changed that and now its working fine. Thank you all for the help.