Firestick No Sound: How to Fix It
Check TV volume and input
Make sure your TV is not muted and is on the correct input. Check if other devices have sound on the same TV.
Check Firestick audio settings
Settings > Display and Sounds > Audio. Make sure Dolby Digital Plus is set correctly. Some TVs do not support Dolby — switch to PCM if audio is missing.
Check app audio settings
Some streaming apps have their own audio settings. Check the app settings for audio output format and language.
Try a different channel
If one channel has no sound, the issue may be with that channel's stream, not your Firestick. Try several channels.
Restart Firestick
Settings > My Fire TV > Restart. This can fix audio glitches.
Check HDMI cable
A loose or damaged HDMI cable can cause audio issues. Reseat or replace the cable.