MacBook Air 13" (Mid 2012) 1.8 GHz Logic Board

My Problem

Apple MacBook Air suddenly decided to quit, no apparent reason.

Back-up of data, but not of all installed programs and their settings, including stuff like painstakingly tweaked 3D printer driver.

Downloading circuit diagrams and testing with DMM and scope did not really reveal cause, noticed some 2 or 3 caps connected to PPBUS_G3H becoming very hot though, suspected near-shorting or whatever.

Removal of these made no difference.

Apple Centre quotes high replacement cost and advises loss of SSD contents (data & programs)

My Fix

Ordered replacement Main Logic Board ('mid-2012') from IFixit.

Arrived 2 days later (US to EU).

Installing board is fairly easy. And SSD turns out to be the 'treasure-chest' indeed: computer starts up with everything the way it was. Mission accomplished.

Too bad the root-cause of the original problem remains unclear.

My Advice

Find an SSD SATA or USB converter and make back-up (image ?) of SSD contents.

My Problem

dropped my macbook air and the logic board was damaged

My Fix

It was an incredibly easy process. I just followed the step by step instructions on Ifixit for removing the old logic board and installing the new one. I did not need to look to any outside resources for additional instructions

My Advice

keep the small screws from each step in separate containers (I used shot glasses). many of the screws look the same but they are all slightly different so you will want to have the grouped by each step in the process.