First check the volume on both the STB and your TV. If the volume is up high on both, and you still receive no sound, please try swapping the HDMI (if you are using one) with the AV cable.
First check the volume on both the STB and your TV. If the volume is up high on both, and you still receive no sound, please try swapping the HDMI (if you are using one) with the AV cable.