Panasonic TC-55AS530U - Manual (Page 143)

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Sound - None
Why is there no sound coming from the TV?
● Make sure the volume is up and mute is off.
● Check that the correct SAP (Secondary Audio Program) is selected by
pressing the SAP button on the remote control.
● If the TV is connected to a Panasonic Home Theater via HDMI cable, then
check VIERA Link controls.
● If the TV is connected to a Home Theater via optical cable, then: Check
the connection, the audio system is on, the correct input is selected.
● Check HDMI in analog/digital audio settings.
MENU Menu > Sound > HDMI input