So my MacBook Air 13" (A1466) died suddenly, just wouldn't turn on, this was like a day after having it charged to 100% and only it sleeping since, then it just would not turn on, no orange/green light, etc. The board is 820-3437-B.

First thing I tested and noticed was that PP3V42 was missing, I then checked and it was shorted to ground so I removed L7095 and tested to see if it was system side, which it was. After injecting 3.3v the SMC started to warm up (around 40'C before I removed the voltage) so I'm guessing this means the SMC is dead?

I'm happy to attempt...

Re: New Members - please post your introductions here

Hi everyone! I've joined a few forums after deciding to jump into learning component level repairs due to my MacBook Air dying randomly and having no interest in paying for apple to replace the logic board.

My qualification is telecommunications but I have knowledge in programming, electronics (I've soldered and fixed circuits before but never SMD and never anything this complex), those two obviously come together with some arduino stuff, and I'm pretty knowledgeable with most things technology related.
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