On: It's your device, you should be able to repair it

[swiley]

I've seen the macbook air schematic/vector art for the board (I had to replace that BGA backlight driver on my sister's laptop.) It's certainly big but at the end of the day it's networks of chips and L/R/C like any other circuit, you just walk through it like any other maze/graph and get to where you need to be.