Hello,

I have a Sonos Arc connected to my 2021 LG G1 television via the eARC HDMI cable that was provided with the soundbar. My system includes two Sonos Ones for surround and the Sonos sub.

Over the last couple weeks, any Dolby Atmos content drops out after about 20 minutes. In order to get the sound back, I need to either unplug the HDMI cable and reconnect it, or switch to a different HDMI input and back to the original input via the TV remote. This happens when using the Xbox Series X via HDMI, or when using the Apple TV with any streaming services broadcasting in Atmos.

I have tried several online troubleshooting steps such as: a different HDMI cable, unplugging the system and disconnecting the HDMI for several minutes and rebooting, turning off TV autoplay, disabling HDMI-CEC, disabling the TV’s wireless adapter and probably other things I am forgetting. It still seems to be happening without fail about every 20 minutes or so.

in the TV settings I have it set to eARC on and I’ve tried various settings such as passthrough, auto detect, etc. and nothing resolves the issue.

I am at my wit’s end here. I ran a diagnostic today and the code is 38651051.

Can anyone give me some guidance or other suggestions? I purchased this system months ago and played plenty of Dolby Atmos content without any issue.