MacBook Pro won't turn on, but hear fan noise

My MacBook Pro, (2010 I think) won't turn on.
The power cord is working. I've tried two cords and get a a green indicator light when power cord is plugged in to computer.
With the power cord still plugged in, when I press the button to check the battery charge level all of the lights flash green.
With the power cord still plugged in my white sleep light on the front of the laptop is flashing.
When I remove the charger from the computer all of the battery charge indicator lights flash once.
When I remove the power cord and press the button to check the battery charge level nothing happens, no lights at all. White sleep light doesn't flash either.
When power cord is plugged in and I press the power button I can hear the computer trying to turn on, or something is working away inside. I don't hear the chime tho so it isn't starting.
Any help would be appreciated.
Thank you, Lori

Please make a Genius Appointment and take it in for service.

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