MacBook won't power on, even when plugged in

Not sure what's going on. My white MB is my secondary computer, I've only had it for a few months. I brought it on a trip a couple of weeks ago and it was fine. It's been packed up in its case since I've been home, so I'm sure the battery is probably dead. I took it out today, and plugged it in, but it won't power up. Even if the battery is dead, shouldn't it turn on when it's plugged in?
I get nothing...no sound, no flicker, no nothing. Help? I have an Apple store close by, so that's not a problem...just want to make sure I'm not missing something dumb before I head over there.
-SB

The Apple store called this morning and confirmed it was the logic board that went bad, and that it was fixed and ready to be picked up. I stopped by to get it after work and I'm back up and running again...and I couldn't be more pleased with how Apple handled the whole process. Less than 24 hours from the time I dropped it off to the time it was fixed and ready for pickup.
Kudos to the San Tan Village Apple Store in Gilbert, AZ!!
-SB
Message was edited by: SisterBlue

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