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Loud Short Buzz Coming from Beam after TV is turned off


Just bought a Beam & LG C8 TV, so far they are both working beautifully with the exception of the loud noise I'm getting once I turn the TV off. It's very inconsistent, sometimes it happens 10 - 60 seconds after the TV is turned off other times not at all. I'm connecting the beam through the HDMI ARC port and using the supplied HDMI cable provided by Sonos. This doesn't happen with the built in TV speakers. Anyone experiencing anything similar?
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Best answer by Ubergezza 15 December 2018, 08:59

Thanks guys. That was a setting I needed to change so will wait and see if I don’t experience that again. Cheers

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adodero wrote:

Just bought a Beam & LG C8 TV, so far they are both working beautifully with the exception of the loud noise I'm getting once I turn the TV off. It's very inconsistent, sometimes it happens 10 - 60 seconds after the TV is turned off other times not at all. I'm connecting the beam through the HDMI ARC port and using the supplied HDMI cable provided by Sonos. This doesn't happen with the built in TV speakers. Anyone experiencing anything similar?



HI adodero,

Welcome to the community. Can you submit a diagnostic report after this happens, then reply here with the confirmation number?
I also have this intermittent issue.
My diagnostic number is 1116500253.
Thanks! I actually think I found a solution (so far no buzzing). Under General->Simplink(HDMI-CEC) TURN OFF (Auto Power Sync). This doesn’t need to be on since the Sonos never really turns off, this signal is essential doing nothing.
I’ll have a look through settings on the TV and see how mine is fixed. Thanks for the suggestion.
I think that's the first time I've seen a solution posted for that issue. Thank you!
Thanks guys. That was a setting I needed to change so will wait and see if I don’t experience that again. Cheers
Same problem here
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Same problem here. Also with an LG C8. Doesn’t happen very often though.
Same issue. Tried the reommendation re turning of power synch but still happening.
Yes I have this too, a few seconds after turning the TV off I get a loud sudden buzz for a couple of seconds from the Beam. My TV is a LG SK8500. I have tried turning off the auto sync power setting but it makes no difference.
I get this every now and again. I have had my Beam for about a month and it has happened maybe 3 or 4 times. I have the beam connected via HDMI ARC to a brand new LG B8.
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My Beam does the same hooked up to an LG E8 does the same Mr Sonos, heard it tonight and wife said it's done it a few times now. Tried the Simplex fix will wait and see if that works.
I have this issue with LG C8 — it can be VERY loud, the people living above me love to complain about noise. I need a solution.
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Simply wrote:

I have this issue with LG C8 — it can be VERY loud, the people living above me love to complain about noise. I need a solution.

LOL mine went off a couple of nights ago about 5 mins after I went to bed. It's only intermittent and seems quite random.

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