30 minutos - 2 horas
If I had picked up that glass of water and deliberately poured it right into the keyboard, I couldn't have done a better job of damaging the kids' MacBook Air than I did by whacking my elbow into it and having probably 8 ounces land in the area around the Caps Lock key.
Of course, the Apple Store was quick to notice that the water indicator had gone off and offered to fix the computer for a little over $700.
The one good thing -- they told me that the likely culprit was the I/O board, which is what I bought from iFixit.
Couldn't have been smoother. I waited until I had a big block of free time on a Saturday, but I did the whole job in less than an hour. The pictures in the tutorial were spot on. Every time I wasn't 100% sure of a connector that had to be unplugged, I just looked more closely at the picture to get my bearings.
Plugged it back in when I was done, and somewhat miraculously, the new I/O board did the trick.
Ice tray. I can't remember where I read this, but the ice tray is critical for keeping the screws straight. Just do Step A, place all of the screws unscrewed from that step into the first ice cube hole, and move on to Step B... At the end, all of the screws are where you need them, and you just work your way backwards through the ice tray.