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How to fix “No Signal” on HDMI input when CommBox Commercial Display is connected to VC bar

If your CommBox Commercial Display V4 (A8) (Model: CBDA8) is connected to a VC device and shows “No Signal” after restarting, this guide will help you fix it by adjusting the EDID settings.

Applies To
CommBox Display V4 (A8)
VC bar connected via HDMI

Step-by-Step Instructions

Step 1: Turn on your CommBox Display

  • Press the power button on the remote or display.

  • Wait for the screen to fully boot up.

Step 2: Check HDMI input

  • The display will default to the HDMI input after restarting.

  • If you see a “No Signal” message, continue with the next steps.

💡 Tip: This happens because the display defaults to HDMI 2.0, we have found to improve compatibility of the handshake to change the EDID setting to 1.4.

Step 3: Open the Settings Menu

  • Using your remote, press the Settings button.

  • Navigate to Input Settings or Advanced Settings depending on your firmware version.

Step 4: Change EDID settings

  • Locate the EDID option (may appear under HDMI Settings).

  • Change the EDID setting from 2.0 to 1.4.

✅ This ensures the display uses a more broadly compatible HDMI signal format.

Step 5: Save and reboot

  • Confirm the change and exit the settings menu.

  • Reboot the display and ensure the Neat Bar is powered and connected.

  • The signal should now appear correctly on the HDMI input.