Occasionally (< 5%) of the time when the power cable is connected it'll be on power, but not charging. Given the computer knows it's connected this seems like a software thing. We had a similar problem with another MBA, though it was on a timeframe of about 1 day. Had problems with the light, had trouble waking it, within 24 hrs it wouldn't turn on at all. Motherboard from what I understand was replaced by Apple. This has been going on for quite a while though and no issues waking it up from sleep. As the computer is going out of warranty soonish, should I get it looked at/is it a sign of a potential component failing, or is it fine to ignore?