When using CEC, a variety of issues can be expected.
First, to prevent issues, ensure that all components on both sides of the HDMI cable support CEC.
On the AV source, turn on CEC in the setup menu.
On the AV display, ensure you are plugged into the CEC supported HDMI port, and that CEC is turned on within the setup menu.
Some product specific findings:
Vizio M Series Turns On but not Off
Vizio V Series Turns Off but not On.
vizios power on normal but to turn them off one must switch to hdmi2 / wait 15 sec / switch to hdmi1 / wait 15 sec / power off.
CEC is implemented under several product names: Hitachi: HDMI-CEC LG: SimpLink Mitsubishi: Net Command Onkyo: RIHD Panasonic: HDAVI Control, EZ-Sync, or VIERA Link Philips: EasyLink Pioneer: Kuro Link Roku: 1-Touch-Play Samsung: Anynet+ Sharp: Aquos Link Sony: BRAVIA Sync Toshiba: CE-Link or Regza Link Vizio: CEC There are plenty of pros to HDMI CEC and very few cons. And while the pros outnumber the cons, there may be instances where you may want to disable HDMI CEC or upgrade your system to one that uses eARC–a newer standard that improves upon HDMI CEC’s features while eliminating the need for setup. Pros There are a number of advantages HDMI CEC provides. As previously mentioned, it allows for several global controls, allowing you to more seamlessly integrate your home theater system. Additionally, HDMI CEC works in combination with HDMI ARC (Audio Return Channel) to reduce the number of cables necessary to connect multiple devices. In short, HDMI ARC allows for audio to travel in both directions, reducing the number of cables you would need to connect an external source such as a Blu-ray player to a TV and A/V receiver. In order to take advantage of HDMI ARC, your devices must have HDMI ARC or eARC ports. Usually, configuring your devices for HDMI CEC enables HDMI ARC along with it, but check your device manual to be sure. Cons The primary drawback to HDMI CEC is the limitation of HDMI ARC to deliver full quality surround sound. HDMI ARC is capable of transmitting uncompressed stereo audio or compressed 5.1 surround sound audio. That’s it… If you want uncompressed 5.1 channel or better audio, you’ll either have to disable HDMI CEC and ARC on your devices or upgrade to devices that support HDMI eARC. HDMI eARC is capable not only of delivering 5.1 and 7.1 uncompressed audio but can also handle better high definition formats put out by Dolby and DTS. Setting Up HDMI CEC Setting up HDMI CEC varies from device to device. Usually, HDMI CEC settings can be found in the sound settings or system settings of your device’s settings menu. You will need to configure the HDMI CEC settings for each of the devices you intend to connect with HDMI CEC. If you upgrade your system to one with HDMI 2.1a ports, they will have HDMI eARC automatically enabled, and if any of your components aren’t compatible with HDMI eARC, they will revert to standard HDMI ARC (with all the drawbacks previously mentioned). How to Enable CEC on Popular TVs Enabling HDMI ARC and CEC is different from manufacturer to manufacturer, but they generally follow the same steps. You go into your device settings, you turn on HDMI ARC, and then you may or may not need to discover other devices. Here, we’ll review how to set up HDMI ARC and CEC on five popular TV brands. LG – With LG TV’s, click the home button and go to Settings. Select Sound and then Sound Settings. From here turn ARC Mode to the ON position and turn the TV Speaker to OFF. Vizio – From the menu, select System. Then select CEC. Where it says CEC Function select Enable, and where it says System Audio Control select On. From here, select the Device Discovery option and wait for your TV to discover the other devices you’ve connected. Sony – From the Home menu go to Settings, then System Settings. From here, select Set Up, then AV Set Up. Make sure the Speakers setting is set to Audio Out. Click back to go to the Set Up menu again then click BRAVIA Sync. From here, select BRAVIA Sync Device List. TCL w/ Roku – From the Home menu, select Settings, then System. Select Control Other Devices (CEC) and enable both HDMI ARC and System Audio Control. Samsung – From the Menu select System and then turn Anynet+ to the ON position. You will also need to enable HDMI ARC on your A/V receiver or soundbar. To do this, you will need to turn your TV to the input setting the audio device is connected to. From here, you must navigate the settings menu of the audio device to enable HDMI ARC and CEC, which again may be referred to by different names. In some instances, particularly with certain soundbars (most notably Sonos), you will need to download an app in order to set the device up for HDMI ARC. Simply download the app onto your phone and follow the instructions.