When a speaker vanishes from the app
Sonos’s own support order, which matches what works in the field — and note what is not on this list: factory reset. Sonos explicitly recommends against resetting as a troubleshooting step, and so do we.
Same Wi-Fi, fresh app
Your phone must be on the same Wi-Fi network as the system — not cellular, not the guest network. Close the Sonos app fully and reopen it; half of “missing” speakers reappear right there.
Reboot the speaker
Unplug its power cord, count 10 seconds, plug back in. Portables: hold the power button about 5 seconds until the light goes out (a frozen Roam takes a 15-second hold). Give it a minute to rejoin.
Reboot the router
Unplug the router 10 seconds, replug, and give the network several minutes to settle before judging. If your house has a pile of Sonos gear, bring it back in this order: router first, then speakers.
Watch the light
A speaker showing a flashing green light after its reboot is telling you it lost its system membership — re-add it in the app (Settings → Add Product). Solid white and still missing points back at the network: move it closer to the router or deal with the interference.
Arc or Beam not playing TV sound?
Same physics as every soundbar: the Sonos must be in the TV’s HDMI port labeled ARC or eARC, with the cable seated firmly at both ends (Sonos’s own supplied cable is good — use it). Set the TV’s audio output format to Auto or Bitstream/Passthrough, not PCM, which locks you to stereo. If another device’s HDMI-CEC keeps hijacking the audio, disable HDMI control on that device, not the TV.
One myth worth killing: you do not need eARC for normal TV sound — plain ARC carries everything including regular Dolby Atmos (in its Digital Plus form). eARC only matters for lossless Atmos from Blu-ray on an Arc, Arc Ultra or Beam Gen 2. Nobody’s movie night fails over that distinction; ports and settings fail it.
The app, tuning, and the last resort
If you swore at the Sonos app in 2024, you were not alone — the rewrite that year shipped rough and the CEO lost his job over it. It has been substantially fixed since: keep the app updated and most of the old complaints are gone. Once everything is stable, run Trueplay tuning (app → Settings → your speaker → Sound → Trueplay) — it measurably improves the sound and most people never find it. And the factory reset (hold the Join/Bluetooth button while plugging in, until the light flashes orange and white): genuinely last resort only, because it wipes the speaker’s system data permanently. If you are resetting more than once, the problem is the network, not the speaker — which is exactly the thing we fix.
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More guides: Soundbar not playing TV audio · TV won’t connect to Wi-Fi · Restart your router the right way
Quick answers
My older Sonos gear won't join the new app.
Sonos split its world in two: gear from roughly 2015 onward runs the modern app; the oldest products (original Play:5, ZonePlayers, the Bridge) live on the separate S1 Controller app forever. Mixed households run both apps as two systems — they work, they just can't group together. We can tell you which side of the line your gear falls on from the model names.
Music cuts out when the microwave runs.
That's textbook 2.4GHz interference — microwaves, baby monitors and old cordless phones all stomp on it. Move the speaker or the router, or let us put the system on a properly channeled network; Sonos gear is only as stable as the Wi-Fi under it.
Do I still need to wire one Sonos to the router?
That old advice comes from SonosNet, the private mesh older systems built from a wired speaker. Sonos has moved its newer products to standard Wi-Fi, so for current gear the answer is: no — but a strong Wi-Fi network matters more than ever.
The app finds the speakers but music keeps stopping.
Dropouts with everything visible = bandwidth or interference, not Sonos. Check what else is hammering the Wi-Fi, and if the system is big (5+ rooms), it deserves its own network treatment — that's a one-visit fix we do often behind whole-home audio installs.
Can you add Sonos to rooms that don't have it?
That's half our whole-home audio business — mixing Sonos with in-ceiling speakers via a Sonos Amp so the kitchen, patio and pool all play from the same app. Phone quote is free.