Originally Posted by PonsArak
Not sure if anyone can offer up any suggestions of things to try.
Been a happy TCL p607 owner since the orders first went up on amazon.
With last nights firmware update, it seems to have broken ARC between my tv and my Denon S530BT. Nothing I have tried has been able to fix it.
Tried power cycling both. Tried unplugging hdmi cables between the two and reseating.
Ultimately did a full factory reset on both the TV and the Receiver.
Set everything back up, made sure HDMI CEC is turned on in both the Denon and the TCL, TCL still won't detect the arc connection to receiver (verified it is plugged into the correct HDMI receiver connector).
Everything else seems to be working fine with the new firmware 7.7.0 build 4111. Except for ARC. I actually had the tv on and running, while I was in the other room, and the ARC was operating fine until immediately after 7.7.0 build 4111 got pulled down automatically.
Is there a manual way to pull down the last firmware. Not that that would do me much good considering the tv would just auto update again...
Really didn't want to have to contact TCL support on my limited time off, but don't see what choice I have.
FYI in case anyone ran into the above issue, I figured it out.
I, about 10-12 hours prior to the firmware coming down to my TV, added a rasberry pi/retro pie device to my hdmi 1 port on my tv. Everything was fine until my tv rebooted/firmware updated 12 hours or so later.
Hence why I was sure something in the firmware borked something with ARC, but no one else seemed to be having this issue.
Well it turns out, I did some further troubleshooting, and when I removed the retro pie from Hdmi1 on the P607, it allowed to CEC list in the tv to detect my receiver again. So to further research the issue, I added the retropie back to hdmi1, and everything worked fine, UNTIL my tv was powered off and then back on and then I was back to the problem in my original post. Something with the retropie on hdmi1 or 2, is taking over and keeping cec from working properly on hdmi3 on the tv. I have recreated the issue multiple times in my testing.
Hope this helps anyone else that may have ran into this issue with the p607 and receivers and rasberrypi/retropie devices. It was a doozy.