Troubleshooting OPTIK TV audio issues

Ensure that the HDMI cable and any other cables (optical, RCA stereo, etc.) are properly plugged in. Please disconnect and reconnect them to ensure a good connection

Ensure that the audio of the TV or audio device is turned on (for example, check that the equipment is not on mute)

Ensure that the audio settings of your personal equipment (TV, home theatre, amplifier, soundbar, etc.) are configured properly, if applicable. If necessary, you can refer to the manufacturer’s manual for your personal equipment to learn more about possible configurations

Go to a standard definition (SD) channel (e.g. channel 3) and then back to a high definition (HD) channel (e.g. channel 503)

Menu / Settings / Audio / Digital audio output

Try changing the audio mode and then changing it back to the desired mode (e.g. change stereo sound to surround sound, save, then change it back to the initial mode and save again)

Check to see if the sound is now working after this change

Menu / Settings / TV / Screen aspect ratio

Try changing the selected format and then changing it back to the desired format (e.g. change the format from 1080p to 720p, save, then change it back to the initial format and save again)