Fix itWorking guide

Fix a Fire TV Smart TV with video but no audio

Verify mute, choose the intended TV-speaker or external-speaker output, use Auto ARC and digital format settings, and restart before resetting.

Start here

Direct answer

The shortest reliable path.

Clear mute and raise volume first. For built-in TV speakers, open Settings → Display & Sounds → Audio Output and turn TV Speakers on. For an external speaker, turn TV Speakers off and set ARC Mode and Digital Audio Format to Auto. If the settings are correct, restart Fire TV before considering a factory reset.

System view

Check the whole path.

01Fire TV app audio
02Fire TV audio output setting
03Built-in speakers or ARC path
04External audio device when used

Scope before steps.

Applies to

Amazon Fire TV Smart TVs that display a normal picture but have no sound from the selected built-in speakers or external audio system.

Does not cover

Fire TV Stick audio on an unrelated TV, no-power or no-picture failures, Echo home-theater groups, or every third-party soundbar format.

Procedure

Do this in order.

01
Clear mute and prove volume
Press Volume Up and confirm that the TV is not muted.
Why this stepAmazon places basic mute and volume checks first in its no-audio path.
02
Select built-in speakers when that is the goal
Open Settings → Display & Sounds → Audio Output and set TV Speakers to On.
Why this stepBuilt-in speakers remain silent when the output has been assigned elsewhere.
03
Configure the external-audio path
For an external speaker, set TV Speakers to Off, ARC Mode to Auto, and Digital Audio Format to Auto, then confirm the speaker input and volume.
Why this stepAmazon documents these as the baseline external-speaker settings.
04
Restart without erasing the TV
Hold Play/Pause plus Select for three to five seconds, or unplug the TV for at least 30 seconds and reconnect it.
Why this stepA restart reapplies the audio path without the data loss of a factory reset.

Diagnostic matrix

Read the result, not the guess.

What you see	Check next	What it means
Built-in speakers work when enabled	Move to the external speaker, ARC port, input, and cable as a separate branch.	Fire TV can generate audio; the external path is the remaining problem.
Only one app or title is silent	Test another app and inspect that title’s audio track before changing global output settings.	The system-wide audio path may already be working.
Neither built-in nor external speakers work after restart	Record the output settings and contact Amazon before a factory reset.	The problem persists across both output branches.

Stop conditions

Know when not to keep changing things.

Do not factory-reset the TV before testing both output choices and the supported restart.
Do not enable built-in and external output assumptions simultaneously; select the intended path.
Contact support when multiple apps remain silent on both speaker paths after the documented restart.

Before you start

Prepare the test.

Confirm that video is present and the problem affects more than one app or title.
Identify whether sound should come from the TV speakers or an external speaker.
Locate mute and volume controls for both the TV and external audio device.
Record the current Audio Output settings before changing them.

Source record

What this guide rests on.

The procedure is synthesized from official documentation. It has not yet been verified on a physical bench by GearCurrent.

01
Amazon Customer ServiceFire TV Smart TV Has Video but No Audio
Official mute, built-in speaker, external ARC, digital format, and restart instructions.
02
Amazon Customer ServiceHow to Set Up Fire TV 4-Series
Official Fire TV Smart TV ports, output context, setup, and model-specific troubleshooting entry points.

The shortest reliable path.

Scope before steps.

Clear mute and prove volume

Select built-in speakers when that is the goal

Configure the external-audio path

Restart without erasing the TV