TCL TV No Sound — How to Fix It

What Does This Error Mean?

No sound on a TCL TV is almost always caused by the TV being muted, the volume being at zero, or the audio output being set to HDMI/ARC when no external speaker is connected. Press the mute button on the remote, raise the volume, and check the audio output settings. Most sound issues resolve in under a minute.

Affected Models

TCL 4-Series
TCL 5-Series
TCL 6-Series
TCL S4
TCL Q6
TCL QM8

Common Causes

The TV is muted — the mute icon is showing on screen
Volume is set to zero on the TV or the connected external speaker
Audio output is set to HDMI ARC or optical but no external speaker is connected to that port
The audio format (Dolby Atmos, DTS) selected is not supported by the current content or speaker
A firmware bug has muted a specific audio channel

How to Fix It

Press the Mute button on the remote once to unmute. Check that the volume level is above zero.

The mute icon (speaker with a line through it) appears in the top corner of the screen when muted.
Check the audio output setting. On Roku TV: Settings → Audio → Audio mode. On Google TV: Settings → Display & Sound → Audio → Audio Output. Set it to TV Speakers if no external speaker is connected.

If the output was accidentally set to HDMI ARC or Optical/SPDIF without a speaker connected, the TV sends audio out that port and you hear nothing.
If using an HDMI-connected soundbar or receiver, check that the HDMI cable is seated firmly in the ARC port and that the soundbar is on and set to the correct input.

An eARC/ARC soundbar must be connected to the HDMI ARC port (usually labelled on the TV) — not a standard HDMI port.
Change the audio format. On Roku TV: Settings → Audio → Audio mode → Stereo. On Google TV: Settings → Display & Sound → Audio → Surround Sound → None.

Selecting Dolby Atmos or Surround Sound when the content or speaker does not support it can result in silence. Stereo always works.
Perform a factory reset of audio settings only if available, or power cycle the TV (unplug 60 seconds, plug back in).

A firmware-related audio mute clears on a cold restart.

When to Call a Professional

If no sound comes from the internal TV speakers even after muting is confirmed off and audio output is set to TV speakers, the internal speaker amplifier may be faulty. A repair technician can test and replace the audio amplifier board. For budget TCL models, a Bluetooth speaker or soundbar is often a more cost-effective solution.

Frequently Asked Questions

TCL TV had sound and then it suddenly went silent mid-show — why?

A sudden audio dropout mid-content is usually a brief HDMI handshake interruption or an app audio glitch. Pause, wait 5 seconds, and press play. If audio does not return, exit the app and relaunch it.

Some apps have sound but others don't — what causes this?

Apps that output Dolby Atmos or DTS audio formats may conflict with the TV's audio mode setting. Set audio output to Stereo (PCM), which is compatible with all content and apps.

My TCL TV lost sound after a software update — how do I fix it?

Firmware updates sometimes reset audio settings. Check Settings → Audio (Roku) or Settings → Display & Sound → Audio (Google TV) and confirm Audio Output is set to TV Speakers and Audio Mode is set to Stereo or Auto. A full power cycle after the update also resolves audio initialization glitches.