Today I sort of accidentally paired my PS4 controller with my Bravia X850 HDTV.
Now, whenever I hit the PS button, it takes me straight to PS Now.
Before, it would switch the input to PS4.
The real problem is that even if I switch the input manually to PS4, the controller is no longer recognized... pushing the PS button again takes me back to the TV's PS Now screen.
How can I unpair it from the TV, so it works with my PS4 again?
I think I figured it out.
I had to go to Bluetooth - Unpair
Then plug it back into the PS4 via USB, which re-paired it with the PS4.
Looks like it cannot be used with both.