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How to troubleshoot liquid damage no power A1502 MacBook Retina 13,3


I have Macbook Retina 13,3 A1502 with liquid damage.

When you plug in the charger the green light of the magsafe adapter will burn and doesnt turn on.

changed magsafe dc jack and my charger.

When i dissambled the macbook, i saw some sticky liquid around three BGA chips on the motherboard.

I cant find any schematic for A1502 so i dont know what these chips are.

image from the internet:


the red ones had liquid damage, already cleaned up with alchohol. The small circle one is a power management ic.

the black circle is a Flash ic(this chip hasnt been infected by liquid damage but it didnt look well under he microscope) but cant find the other ones. i looked on the numbers on the chips to know what these bga's are.

Can someone explain me what these other 2 chips are, where i can find the schematics for my A1502, and how to measure with no power issues on this laptop. I have the soldering skills to do this repair but without schematic i dont know where to start.

if someone can help me i will really appreciate it.


MacBook Pro 13" Retina Display Late 2013