My Air had a dead battery and problems with the I/O unit. After five years I thought I should buy another one. A shame, because the Mac worked perfectly.
The new battery and I/O unit arrived in only three days from USA to Spain, and I followed the instructions to repair. No problems. The Mac lives ag . . .
My I/O board sustained water damage while living in humid environments for the past 4 years, and it had signs of corrosion. The most annoying problem was the intermittent charging. The battery was not in the worst shape (~1200 charge cycles), but since I was opening up the case, I decided to replace . . .
Brought my Macbook Air late 2010 to Apple to fix the IO board because it would not charge any more and I could see that the contacts were very worn. Apple wanted to charge me $700 and demanded that I change the logic board too, because they said it looked as if is might have water damage. But I kn . . .
A faulty power supply damaged the power in my MacBook air. The MBA was no longer charging with any power supply! A bit of online searching revealed that the MBA has a separate IO sub board, and there was a chance that it was broken and not the whole motherboard.
I used the last of the batt . . .