A TV box, also known as a set-top box (STB), is a device that connects to a television and provides additional functionality beyond what the TV itself offers. The popularity of TV boxes continues to grow as technology advances and users seek more control and customization over their home entertainment experiences.

If your TV box is not producing sound, there could be several reasons for this issue. Here are some common troubleshooting steps you can take to identify and potentially resolve the problem:

1. **Check the Volume Levels**: Ensure that the volume on both the TV and the Android TV box is turned up and not muted.

2. **Audio Output Settings**: On some TV boxes, you may need to adjust the audio output settings. Make sure the correct audio output is selected (e.g., HDMI, S/PDIF, or analog audio).

3. **Connection Issues**: Check all the cables connecting the TV box to the TV or external speakers. Ensure they are securely plugged in and not damaged.

4. **Audio Format Compatibility**: Some TV boxes may have issues with certain audio formats. If you’re playing content with an unsupported audio format, you might not hear any sound.

5. **Software Glitches**: Restart the TV box to see if a temporary software glitch is causing the issue. Sometimes, a simple reboot can resolve many problems.

6. **Update the Software**: Make sure your TV box is running the latest firmware or software version. Updates often include bug fixes that can resolve audio issues.

7. **Check the Source**: Ensure that the issue is not with the content you are trying to play. Test the sound with different apps or media sources to see if the problem persists.

8. **External Speakers or Audio System**: If you are using external speakers or an audio system, make sure they are turned on, the correct input source is selected, and the volume is up.

9. **HDMI CEC Settings**: Some TVs have HDMI Control (CEC) settings that can affect the audio output. Check your TV’s settings to ensure that CEC is not interfering with the audio.

10. **Hardware Issues**: If none of the above steps work, there might be a hardware issue with the TV box, the TV, or the speakers. In this case, you may need to contact the manufacturer or a professional for further assistance.

Remember that the specific steps to troubleshoot may vary depending on the make and model of your TV box and TV. Consult the user manual for your devices for more detailed instructions. If you need more help, feel free to ask me.