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Troubleshooting Common Issues with Your CommBox Meeting Room Display Gen 2

Step-by-step fixes for the most common problems with the CommBox Meeting Room Display Gen 2 — from no power and no image to audio issues and colour problems.

Applies To CommBox Meeting Room Display Gen 2 — All models

Step-by-Step Instructions

Step 1: Fix Power Issues

  • Power light not coming on — check the power cable is firmly connected at both ends, confirm the power point is on, and check the rear power switch is in the ON position
  • Screen turns off unexpectedly — check that the vents are not blocked and the screen has adequate airflow; also check the No Signal Standby setting under Power On/Off Settings

Step 2: Fix Image Issues

  • Power is on but no image — check the correct input source is selected (press SOURCE on the remote); confirm the video cable is firmly connected; ensure the connected device is turned on and sending a signal
  • Image is jerking, flickering, or showing ripples — this is usually electrical interference; try turning off nearby devices such as lamps or fans, or move the screen away from them
  • Screen too dim or too bright — go to MENU > Image Settings > Custom and adjust the Brightness slider
  • Image distorted or stretched — go to MENU > Image Settings > Advanced Image Mode > Aspect Ratio and select 16:9
  • Colours look incorrect or washed out — go to MENU > Image Settings > Custom and check Saturation, Hue, and Colour Temperature; or try Standard mode

Step 3: Fix Audio Issues

  • No sound — check the screen is not muted (press Mute on the remote); turn up the volume using Vol+; if using HDMI or USB-C, confirm your device's audio output is set to the external screen
  • Sound is distorted or too quiet — try a different Sound Mode under Audio Settings; check that the Audio Out cable is securely connected to your external speakers

Step 4: Fix Remote Control Issues

  • Remote not responding — replace the AAA batteries; ensure a clear line of sight to the IR sensor on the front of the screen
  • Remote buttons locked — use the physical buttons on the screen to go to MENU > Other Settings > Remote Lock and turn it off

💡 Tip: If you have tried all of the above and the screen is still not working as expected, a factory reset will restore all settings to their defaults. Go to MENU > About This Screen > Restore Factory Settings.

Troubleshooting / When to Contact CommBox Support

  • The power cable is damaged
  • Liquid has entered the screen
  • The screen has been dropped or physically damaged
  • The screen continues to behave unexpectedly after a factory reset
  • If you need help, log a ticket on the Support Portal in Knowledge Base: https://support.commbox.com.au/knowledge/kb-tickets/new

Video Tutorial Refer to the CommBox Support Portal for guided videos at support.commbox.com.au