Why is my BB Z30 not powering up and charging

My BB Z30 phone battery drained while using it, so i plugged it to charge, it charged for some minutes so i had to just switch it off so that it will charge fast and wont be charging while using after about an hour i checked the phone to find out that it wasnt blinking and it wont come up when i tried powering it on, the red light didnt come up when i tried pressing the power button,
i tried plugging to a power source again and it still didnt come up, even the red light didnt on at and all i get is a dark screen and no sign of life.
pls whats wrong with my phone

Dumb question, but have you tried using a different charger?

I am through the same situation.
Steps tried:
1) Kept charging with different blackberry chargers for several days.
2)Opened phone, disconnected battery , connected and tried charging.

No go. All i see it a double blink of Yellow LED when the charger is switched off.