Sonos Arc / Beam (Gen 1 & Gen 2) soundbars: field manual

Covers: Sonos home-theater soundbars that connect over HDMI ARC/eARC: Beam (Gen 1, Gen 2) and Arc. Setup and control through the Sonos app.

Single sourceBrands: Sonos6 components

Sonos bars have no remote of their own: the TV remote controls them through HDMI-CEC (or IR learning). Nearly every call is a TV-side setting, cable or CEC conflict rather than a hardware fault. Beam Gen 2 ships with an optical adapter; Atmos needs HDMI ARC/eARC, not optical.

Safety first

Don't open the bar; mains power supply inside.
Mount with the correct Sonos bracket into studs or proper anchors.

How it works

The TV sends audio back down the HDMI cable (ARC/eARC). The TV remote talks to the TV; the TV relays volume and power over CEC. If the TV shows its volume bar but the level doesn't change, the problem is TV/CEC side.

The Sonos app's TV Setup configures the remote (CEC or IR). An IR pass-through option exists for TVs with poor CEC.

Status light: solid white = on and normal; flashing white = starting or waiting for Wi-Fi; flashing green = ready for setup; solid green = muted; flashing orange and white = updating or resetting (rarely a fault).

Components & tests

Unlock all 6 components, specs, service mode and teardown

Full library + AI assistant for $34.90, one time.

Get lifetime access

Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

Sonos: what the LED status lights mean

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Soundbar sitting under a flat-screen TV by Pittigrilli, CC BY-SA 4.0

Diagnostic guides for this appliance

Guide · TV

Soundbar won't turn on with the TV, or TV remote won't control its volume (HDMI-CEC)

One-remote control depends on HDMI-CEC over the ARC/eARC cable. Disabled CEC, the wrong HDMI port, an optical connection, a poor cable or a TV update that switched settings off cause nearly all of these calls.

7 steps ~30 mineasy

Guide · TV

Soundbar audio cuts out, pops or drops with movies/Atmos (ARC/eARC)

Dropouts usually come from an unstable ARC/eARC handshake or a format the chain doesn't handle well. Work through cable, firmware, CEC conflicts and the TV's digital audio format; optical is a stable fallback without Atmos.

8 steps ~40 mineasy

Guide · TV

Projector won't turn on or shuts off (reading the indicator lights)

Projectors protect themselves: overheating, lamp at end of life, and lamp-cover interlocks all stop the light source. Read the indicators against the model's table, then fix airflow, lamp seating or lamp life.

6 steps ~30 mineasy

Other tvs manuals

Manual · TV

Samsung QLED Q60 / Q70 / Q80 (2019-2024): quick sheet

Samsung non-Neo QLED (quantum-dot LCD) Q60, Q70 and Q80 series from about 2019 (R) through 2024 (D), Tizen OS. Not the Neo QLED QN85/QN90 mini-LED lines. The letter after the series number is the model year (e.g. Q80R, Q60T, Q80A, Q80C, Q80D as named in reviews).

7 components6 common failuresSamsung

Manual · TV

LG NanoCell (NANO75 etc.) and UHD UQ series (UQ7070 / UQ7570 / UQ8000): quick sheet

LG 4K LED-LCD sets on webOS: NanoCell NANO75/NANO80-class (2021-2023) and UHD UQ7070, UQ7570, UQ8000 (2022) and their UP/UR siblings. Not LG OLED (see the OLED quick sheet).

6 components5 common failuresLG

Manual · TV

Sony BRAVIA X90J / X90K / X90L full-array LED: quick sheet

Sony BRAVIA XR X90J (2021), X90K/X90CK (2022) and X90L/X90CL (2023) 4K full-array LED sets on Google TV.

6 components5 common failuresSony