First, you need to connect your simplink HDMI output port to your LG smart tv’s HDMI port. with help of the HDMI cable. After that, take your remote control and press on the Home icon button and select the more button (It is showing 3 vertical dots at the top right of your screen). After that, goto on General option and select the SIMPLINK
Apple TV goes into a denon avr. Volume was controlling that via hdmi. Now it’s not detecting the hdmi (for volume or CEC). Everything else is working fine. Out of my depth here, but even though ARC/CEC supposedly works with most HDMI cables, you might want to make sure your cable is "rated" to support ARC/CEC. Samsung TV 2018 Settings Guide: What to Enable, Disable and Tweak. To activate HDMI-CEC, go to the External Device Manager, found under the General Settings menu. 2. Activate CEC. To enable [Auto Power] from the Settings menu 1. After turning on the TV, press the [Settings] button on the remote control. From [Settings], select [All Settings]. 2. From [Connection], select [Device Connection Settings]. 3. From [Device Connection Settings], set [Simplink (HDMI-CEC)] to On. Just installed Raspbian on a 3 B connected to a TV that supposedly supports CEC (LG 47LD450), but struggling to find any info on how to test CEC on Raspbian. I want to confirm that it works, or alternatively isolate which part doesn't work (e.g. the cable), but the only thing that turns up in my searches is the cec-client command. It does 1. Unplug the AC power cord of soundbar from the wall outlet. 2. Wait for 2 mins to fully discharge the soundbar. 3. Plug the AC power cord back into the wall outlet. Setting HDMI CEC (Option A) 1. Press Menu button > Setup > VIERA Link Settings > VIERA Link > ON. Go to Settings>Option>Set the Universal Control. If there is already a setting for your PS4 HDMI port select "Cancel Setting" to delete this profile. Otherwise just back out of that menu. Now we need to enable SimpLink. This was hidden in the apps list and not in Settings. Open the app and select SimpLink Setting. aNxLo.
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    • how to enable cec on lg tv