I Can’t Hear Any Sound from My CommBox?

Applies To

All CommBox Touchscreens and Commercial Displays, including setups with soundbars

Step-by-Step Instructions

Step 1

Check the inbuilt speaker volume

• Press the volume buttons on the front of your CommBox screen.

• You should see a volume bar appear on the screen.

• If nothing shows up, try using the volume buttons on the remote instead to test if it’s a button issue.

Step 2

Using a connected soundbar?

• Check that the soundbar is powered on—look for a small light on the front.

• Make sure the audio cable is connected to the input port on the soundbar and firmly connected to the screen.

Step 3

Check the sound settings on your CommBox

• Tap the Inputs icon on the CommBox home screen

• Tap the icon in the bottom right corner to access additional settings

• Use the arrows at the top to scroll to ‘Sound Mode’

• Under Sound Output, make sure it’s set to External Device if using a soundbar
  💡 Tip: Switch it back to Inbuilt Speaker if you're not using external audio

Step 4

If connecting a laptop via HDMI
Make sure the volume is turned up on your laptop and that the audio output is set to the CommBox screen, not the laptop speakers.

• For Windows:

  • Right-click the speaker icon in the bottom right of your screen

  • Click Sound Settings

  • At the top, under Output device, click the drop-down and select CommBox (HDMI)

• For Mac:

  • Click the Apple logo in the top left corner

  • Select System Preferences > Sound > Output

  • Choose HDMI Audio or CommBox from the list

Troubleshooting / What to Do If It Doesn’t Work

• Still no sound? Restart both your device and the CommBox screen

• Cables secure but no audio? Try a different HDMI port or cable

• Using Bluetooth audio? Make sure the speaker is paired and selected as the output device