Philips Cinema 21:9 LED TV 58PFL9955H 147 cm (58") Full HD 1080p digital TV with Ambilight Spectra 3 and Perfect Pixel HD Engine

There is a headphones volume setting in the TV menu, which is used to adjust the headphones volume independent of the volume control for the TV loudspeaker.

If the headphones volume is set to minimum, you will not be able to hear sound from the headphones.

Before you proceed to check the headphones volume, be sure that you have connected the headphones to the input at the rear of the TV. DO NOT connect the headphones to the ‘SERV.U’ connection, which is for service purposes only.

TV's rear connectors

To adjust the headphones volume, do the following:

1. Press the button on the remote control to access the home menu.
2. Use the cursor buttons to select SETUP and press the 'OK' button to confirm.
3. Select TV SETTINGS and press the ‘OK’ button. 
    
    
    
4. Press the cursor down to select SOUND and press the cursor right .
5. Press the cursor down to select HEADPHONES VOLUME and press the cursor right .
6. Press the cursor up  to adjust the headphones volume to suit your preferences.
7. Press the button to exit the menu.

When you have set the headphones volume to an audible level and there is still no sound from the headphones;

• Try the headphones on another device.