I am not able to get audio via the HDMI/ARC to my Denon 1613 receiver. The only way I get audio is via the S/PDIF cable. I had an Insiginia Tv with Roku and was working fine with the same set up. Any suggestions ?
My TCL Series 6 stopped working with HDMI ARC recently, I suspect around the time of the 9.1 firmware upgrade. Previously it would occasionally not sync with my Denon receiver; CEC controls worked but TV and Receiver didn't sync on ARC format resulting in no audio. If I unplugged the HDMI cable and then plugged it in again the sync would be successful and I would get audio via HDMI. I believe there is a timing problem introduced in 9.1.
As with you, I ended up using an optical cable to get it working. From what I understand, I can still get Dolby 5.1 which covers most if not all of what I stream from the TV. I