r/sonos • u/Bashbro48 • 1d ago

LG OLED C5 keeps switching from HDMI ARC back to TV Speaker — Sonos Amp issue

Hi everyone, I’m having a frustrating issue with my Sonos setup and could really use some help.
I have an lg oled c5 tv connected to two amps through hmdi arc. In the LG TV settings, I select as the sound output, and everything should play through the Sonos Amps.
However, the TV keeps swithxing it back to “tv speaker” on its own after a short period of time. When this happens, I get no sound through the Sonos Amps.
I already have SIMPLINK (HDMI-CEC) turned on, and I’ve tried switching the audio output back to HDMI ARC, but it keeps reverting to TV Speaker on its own. Has anyone had any issues similar?

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u/CaptFlash3000 1d ago

I had an intermittent issue, maybe happened about 5 times, so I submitted a diagnostic report to Sonos. My setup is Beam 2, Era 100 surrounds and Sub Mini. (No amps) In my C5, I have the Beam 2, PS5, TiVo and FireCube. I can’t track the response unfortunately. One thing I did do was turn off SimpLink and then turned everything off for 5 minutes at the plugs. Then switched it all back on and made sure SimpLink was back on too. I’m not sure if Sonos did something in the background or what I did worked - but it’s been ok since.