Arc microphone constantly turns off and off by itself

Yep, understood.  I have the Arc and two Era 300’s as sounds and normally the Era 300’s answer a voice request, I must admit I haven’t checked that the mic on my Arc isn’t behaving the same but I’m not aware of it doing so.  I’ll monitor closely over the weekend.

If I just turn off voice assistant on the Arc, will this issue go away? It's not the biggest deal since my eras have it, though I think the product should work as described.

It should ...and the Arc/mic does work fine in my own setup. However it seems no one here can rule out it being a hardware problem or conflict, in your case, at this moment in time. Only a couple of reports here in the main community and Sonos have likely sold many tens of thousands of them since the Arc was first released in June 2020… I would expect many more complaints here if they all had a similar fault.

I have both Alexa and SVC installed on the Arc here, but mostly use Alexa. It’s connected to an LG C9 OLED TV, but I can’t see the type of connected TV as being relevant here, all things considered. 

I would persist with supplying diagnostic data to Sonos Support, including any videos of the issue too.

I switched SVC to Google Assistant and the issue persists. In fact it's even more annoying because there is a verbal cue with GA VS SVC.
 

How do you have both Alexa and SVC active simultaneously? I have an arc and two era 300s in a surround setup, when I try to select different voice assistants for the individual speakers, the Sonos app wants to delete the current voice assistant off ALL speakers that are interconnected.
 

I discussed diagnostics with the first line CS and they looked and saw that sometimes the mic was on and sometimes off. I asked them the “why,” and they said that all they can see is whether a mic was on or off, which is obviously useless. So I don't know how an upper level tech person could help.

And since I can't reproduce the issue on the fly, I'll end up calling them and getting some basic solution, then I'll hang up only to find that the issue persists about 45 minutes later. It's really odd that the issue isn't predictible at all. Sometimes it happens two hours after I start using the system. Sometimes it's a few minutes. How would tech support be helpful unless I'm going to sit on the phone with them for hours?

Now that I have two arcs (the original and replacement), I might try to hard reset the original and not connect it to the tv. Let's see if that changes anything. Though I don't know why an HDMI cord attached to a tv would impact the mic turning on/off. That seems silly.

The other reality is that I bought my original Arc from Sonos and the replacement also came from there. I could just have two “bad batch” arcs. I could go to Best Buy and get another one, but that's such a pain in the ass.
 

Did both of your Arcs come directly from Sonos? Mine did and I'm wondering if we both just got our Arcs from a bad batch.

I tried to give Sonos your diagnostic codes for analysis alongside mine. They refused and said it was a privacy violation unless they had your approval.

Alexa and SVC work together and both can be installed side-by-side. The Google Assistant service only works by itself. It seems Google didn’t want to share its services with others.

Scanning this thread it’s starting to look like there might have been a dodgy batch of capacitive touch boards, hopefully a small batch...

I am wondering if it might actually be a power issue. I notice that oftentimes the on/off doesn't happen until the unit has been doing something for a period of time. As far as I can tell, it isn't turning on/off when nothing is playing through the Arc. But somewhere between 45 min and 2 hours of constant play results in regular on/off cues. I was just listening to music for about 90 minutes. For the first 90 minutes everything worked fine. Then all of a sudden the on/off cues began and repeated within a minute of each other if not sooner. I did not have an HDMI cord attached and the arc hadn't moved position while I was listening. If I'm a betting man, the extensive use heats up the device and is causing a short. I'm no engineer but it's the only thing that makes sense to me.

No short necessarily, but if there’s a false touch periodically registering then it could potentially be exacerbated by increased temperature. 

johhnydrama32

i don’t know if this will work, but pls authorize (via this thread) sonos techs at my monday meeting to access your following diagnostic codes and compare them to my diagnostics

johhnydrama32 diagnostics

723779744

642824365

1529549030

2072542269

1114071393

my hogan1 diagnostics

1520451136

1507668416

1288322289

any sonos real time diagnostics