Hello, My white McBook (2008 or 2009) recently stopped turning on.  When I hook up the Magsafe power adapter, the light shows green, but the computer will not turn on, or make a sound.  I've tried the re-boot option, but nothing works.  Please advise!

Hello,
My white McBook (2008 or 2009) recently stopped turning on.  When I hook up the Magsafe power adapter, the light shows green, but the computer will not turn on, or make a sound.  I've tried the re-boot option, but nothing works.  I first thought I needed a new battery because the lights at the back are all off, but shouldn't the computer turn on once the power adapter is hooked up and the light on the Magsafe adapter shows green?  I'm a computer doofus, so please be kind.  Please advise!  Thanks in advance.
SS

Take it in for service.

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