Chosen Solution
I have a 2012 MacBook Air (A1466) that had liquid damage. Everything points to something on the main board (will not power up). Tried new I/O board & new battery. The power adapter works. I have been looking on eBay and other sites, but I’m not sure which, if any, would be compatible.
To be on the safe side take note of the logic board number..it’s written in quite small characters but can be found with a good light source. It starts with 820-xxxx With that available you won’t have any trouble in finding the correct replacement.
Can I replace my i5 4gb logic board in a mid 2012 macbook air with an i7 8gb logic board. Are they interchangeable?