Hi
My Pi3’s CEC used to work with my old Sony TV.
Now with my new Vizio P50-C1, Pi3’s CEC just does not work at all.
The Pi3 is plugged directly into one of TV’s HDMI port (HDMI-2).
The Vizio TV sees my SoundBar (HDMI-1) and the ChromeCast Ultra (HDMI-3) on CEC, but not the Pi3. On the Pi3, use cec-client to scan would find nothing, no TV, no AVR, nothing. Everything else (video, music, etc.) works flawlessly but just no CEC.