PlayStation 4 doesn’t work on some TVs

If it’s an old TV I wonder if it lacks HDCP or something similar.

Press and hold the power button on your PS4 for seven seconds. This ensures that the PS4 really turns off, which is necessary for starting it in Safe Mode. ^^^^You will hear one beep when you begin to press and hold the button, and a second after about seven seconds. You can remove your finger from the button after you hear the second beep.

• If you're seeing "No Signal," "Weak Signal," or a blank screen, it could be because the resolution is incorrect in your PS4 settings. This sometimes happens when you move the PS4 between different TVs, switch between game systems on the same TV, or make a change to your TV's display settings.