Help 2009 MBP won't start

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i have 2009 mbp 15 inch (not unibody). have put mbp through it's paces i'm not sure has happened.

battery has been bad (for quite time) run in "desktop mode" (always plugged in)

wife , went home xmas , on way computer died. when home plug in start , nothing. no start chime, no initializing of hard drive, fans, nothing.

power cord when plugged in shows charging turns green. i've tried charging few days , starting (nothing starts). i've tried removing battery , trying start ( again nothing).

i'm not sure else can diagnose problem. appreciate advice or tips on might be.

 

if battery dead, might try leaving comp plugged in while - 1 hour, depress start button holding down 10 seconds , release - wait see if boots up.
 


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