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Essentially my MacBook Pro crashed while I was opening QuickTime not too long ago and ever since I have not been able to turn it back on. The only signs of life are when the MagSafe connector is connected with shows green and then allows me to push the battery indicator button. If I press the button immediately after plugging in the adapter it will rapidly blink the first LED and then any presses afterwards will flash all eight LED’s. Other than that nothing else appears to work. I’ve taken apart the entire computer and there aren’t any obvious signs of damage. Thank you in advance to any suggestions; I’m willing to try just about anything!
The flashing battery tester LED’s is telling me your battery is worn-out! You’ll need to install a new one. Here’s the needed part MacBook Pro 15" Unibody (Early 2011-Mid 2012) Battery and the IFIXIT guide to put it it MacBook Pro 15" Unibody Early 2011 Battery Replacement
