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Did you not get Apple Care? A bad motherboard (and just about everything else except drop kicking it across the room) would be covered by Apple Care.

I got a new hard drive a month before the end of my Apple Care (meaning it was a 4 years minus one month old machine). Which we replaced with a bigger one once the Apple Care was up and we didn't have to worry about warranty issues. (it's now an external/portable)

Lessons for others:
Backup backup backup.
Apple Care is totally worth the money.
 
Sorry dude i think that he will charge you for data recovery. No company that i no off covers software faults / data recovery under warranty.
 
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