I work for a medium-sized company. 200+ MacBook Pros 13" 2012. Many people have this problem. The problem seems to be related to the lid being closed and then the battery drains completely without the power cord being connected.
I normally connect the power cord, green light comes on the MagSafe connector. I press the power button. The display shows a grey progess bar. The screen then goes black again. Push the power button again, same result again.
Third attempt. Pushed the power button, grey screen, grey progress bar and spinning timer. Looks like the Macbook is booting up then black screen again.
The white LED indicator goes on then off again and stays off. I really despise these MacBooks. To me they're over priced piles of ****!!!
These are factory out of the box with periodic Mac updates. Mac OS X Mountain Lion 10.8.5.
I tried clearing the NVRAM or PRAM with no imporvement. As follows:
Shut down the computer.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Immediately press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears. Continue holding the keys down until the computer restarts, and you hear the startup sound for the second time.
Release the keys.
Resetting PRAM may change some system settings and preferences. Use System Preferences to restore your settings.