power button doesn't turn off screen on note 4

[Android Central Question]

i've just replaced my carrier-locked not 4 (vodafone) with an unlocked note 4.

On my old note 4 when i pressed the power button briefly the screen turned off, home button to turn it on again. With the new one, a brief press of the power key just brings up the power-off menu.

What am i doing wrong?

 

[belodion]

The device may be faulty.