MacBook Pro Refuses to turn on when not plugged in! HELP!!!

Joined
Sep 29, 2008
Messages
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Location
Oxford, Ohio
Your Mac's Specs
2.5 gHz, 4 gigs RAM
Hello all.
I am writing this on my MBP that I bought in June of this year. Unfortunately, it is freaking out. Here is the scenario:
When the battery is roughly below 85% and NOT plugged into the AC power source, my MBP does not turn on. When I press the power button, the light on the button that opens the screen lights up for a fraction of a second. The speakers emit no noise, but I can hear things starting to spin on the inside before it just quits.
If the computer is plugged in, this does not happen.
If the battery is roughly 85%-100%, it USUALLY doesn't happen.
I took it to the university to see if the IT people could fix it-- the guy reset the PRAM and it worked again... until the next day.
What on earth is happening?!

p.s.- I recently had the logic board replaced... that was the solution to the last problem...:(
 

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