Chosen Solution
I have a MacBook Air that sometimes doesn’t startup at all. So I ran the TechTool Pro 8 diagnostic on it and it has a sensor failure: DC In failed at 16.96v. Does anyone know if there is a way I can fix this other than a new motherboard?
The Mag-Safe is built into the I/O board. There does not seem to be a repair guide for this machine but there is one for the A1466 2012. Take a look: MacBook Air 13" Mid 2012 I/O Board Replacement
I just replaced the part for a brand new one from IFIXIT and it didn’t fix the problem. I’m still get the DC-in Rail 0 Failed at 16.67 V. Anybody else managed to fix it? thx
I had the same issue and I fixed it by using the right charger. No more errors now!
