My HP ELITEBOOK 2570P is stuck on hibernation mode. What should I do?

[Bennylove]

HP ELITEBOOK 2570P is stuck at hibernation mode. PC doesn't display anything and it is ON. It doesn't go off. If you remove the battery and re-insert it, it will still be showing that the PC is ON...yet no display on the screen. 

[Lil_Boy_Blue]

Hi
PLEASE POST ANY RESULTS.
First:- Turn off the computer, press and hold the PWR button for 4 seconds.

Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.

Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat; Re-Connect the AC adapter.

NOW begin checking/testing/proving the Hardware is fit for purpose.
Power on your PC, press ESC (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).

[aggieluna]

My Envy x360 is doing the exact same thing.  Once it goes into Hibernation mode the screen stays blank while the PC continues to run no matter which buttons I push.  It will continue to run (with blank screen) until the battery runs out.