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How to disable HDMI-CEC on your CommBox Classic V3 or V3X screen

Turn off HDMI-CEC on your CommBox Classic V3 or V3X to prevent your screen from automatically responding to commands from connected HDMI devices.

Applies To
Applies to: Classic V3, Classic V3X

What is HDMI-CEC?

HDMI-CEC (Consumer Electronics Control) allows devices connected via HDMI to control each other—for example, powering on your screen when a device like a Blu-ray player is turned on. In some cases, you may want to disable this feature to avoid unintended control or compatibility issues.

Step-by-Step Instructions

Step 1: Select the HDMI Source

  • Make sure your screen is currently set to the HDMI source for the device you want to configure

  • Example: If the device is connected to HDMI 1, select HDMI 1 as your source

Step 2: Open the Inputs Menu

  • Tap the Inputs icon on the side menu or use the remote control

  • The icon usually appears as a series of squares or rectangles

Step 3: Tap the Levels Icon

  • In the bottom-right corner of the Inputs menu, tap the Levels icon (sliders)

Step 4: Navigate to Menu Settings

  • Scroll across the top options until you see Menu Settings

  • Tap to open advanced configuration settings

Step 5: Disable HDMI-CEC

  • In the Menu Settings, locate the option for HDMI CEC

  • Toggle the switch to the off position (left) to disable HDMI-CEC functionality

💡 Tip: Disabling HDMI-CEC can help prevent your screen from switching inputs or turning on/off due to actions taken on other HDMI-connected devices.

Troubleshooting / What to Do If It Doesn’t Work

  • Make sure you're on the correct HDMI input when accessing the settings

  • If the setting doesn’t appear, your screen may need a firmware update