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What Is HDMI-CEC?

Understand how HDMI-connected devices can control TV power, volume, and input switching.

Quick Answer

HDMI-CEC allows compatible HDMI devices to exchange control commands, though manufacturers often use their own brand names for the feature.

Step by Step

  1. Check power, cables, network connection, and the currently selected input/account before changing advanced settings.
  2. HDMI-CEC allows compatible HDMI devices to exchange control commands, though manufacturers often use their own brand names for the feature.
  3. Test the device after each change so you know what resolved the problem.
  4. Use factory reset or removing/re-adding a smart-home device only after simpler troubleshooting fails.

If That Doesn't Work

  • Menu names and capabilities vary by TV, streaming device, smart-home ecosystem, manufacturer, and model.
  • Smart-home devices can depend on Wi-Fi, hubs, cloud services, Thread/Matter controllers, and account integrations; determine which layer is failing before resetting the accessory.