Ok please do the following.
If you have the power adapter plugged into the adapter unplug it.
Next I would like you to remove the battery from the laptop.
To remove the battery turn the laptop over , slide teh battery release lock to the unlock position.
Slide the battery release latch to release the battery.
Pull the discharged battery out of the computer.
here is an image to show you if you can't find teh latches
Once you have the battery and adapter removed press and hold down the power button for 15 seconds.
Next plug the adapter back in but leave the battery out and press and hold the power button to power up the computer.
If it starts normally you can reinsert the battery for charging and it should be all set.
If it does not come on let me know what happens.