I have a TCL 55R615 with Roku TV connected via HDMI3 (ARC) to a Denon AVR1612 receiver. Recently ARC and CEC stopped working. Powering on the TV does not power on the receiver. Volume control on the TCL/Roku remote does not adjust the volume on the receiver. Audio from the TV is coming out the receiver. This all used to work until just recently.
On the TV I go into System -> Settings -> Control other devices (CEC) and no devices are found. If I tell it to search it can't find any devices. All options are enabled (ARC, System audio control, 1-touch play, System standby).
On the receiver I have HDMI Control turned ON. Also, P. Off Control is set to All.
I've rebooted the TV and receiver. I also disconnected other HDMI devices from the TV (Switch, Blu-Ray, Apple TV, Xfinity). Still cannot get the TV to see the receiver.
My TV updated yesterday (9.1.0 build 4917-30). Not sure if this is the cause or not.
Anyone else having problems with this?