Troubleshooting a TV with no audio output involves a systematic approach to identify and resolve potential issues:
Check Volume Settings: Ensure that the TV volume is not muted or set too low. Navigate to the TV's settings and adjust the volume level.
External Devices: If you have external devices connected, such as a soundbar or home theater system, check their connections and settings. Ensure they are powered on and properly connected to the TV.
Audio Source: Confirm that the correct audio source is selected on the TV. For example, if using an HDMI input, verify that the TV is set to receive audio from that HDMI source.
TV Speakers: If using external audio devices, make sure the TV speakers are not set as the audio output. Adjust the audio settings to route sound through the desired output.
Cables and Connections: Inspect all audio cables for damage and ensure they are securely plugged into the correct ports. Try using different cables to eliminate the possibility of a faulty cable.
TV Software Updates: Check if there are any available software updates for your TV. Manufacturers often release updates that address audio-related issues.
Factory Reset: As a last resort, perform a factory reset on the TV. This resets all settings to default, eliminating any software-related problems.
Professional Assistance: If the issue persists, consider seeking professional help. There might be a hardware problem that requires the expertise of a technician.

By systematically going through these troubleshooting steps, you can identify and address the root cause of the audio output issue on your TV.
Read also: How to troubleshoot a TV with sound but no picture