Why won't my macbook air boot up after mountain lion update?

I updated to mountain lion yesterday. computer acted funny at the end of the night, so i shut the lid. today, i opened the lid and it didn't turn right on. so i powered up. got about halfway into booting, and shut off. now it won't start up at all. any help would be awesome! 1,000 karma points to anyone who know what to do, since it won't boot up at all anymore.

it seems to be a power/battery issue. unplugged, it won't boot up at all. plugged in, it boots. as soon as i unplug, macbook air turns off. hope this helps you problem solving gurus out there.

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themachead wrote:
But to be completely fair Apple had a bunch of bad batteries they had to replace...
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Why won't my macbook air boot up after mountain lion update?

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