If you are experiencing no sound when using your TV as the input source for your WiiM device, follow these steps to resolve the issue:

Step 1. Check the HDMI Port Connection on the TV

• Check that the HDMI cable is connected to the port labeled HDMI ARC on the TV. Other HDMI ports on the TV do not output audio.

Step 2. Check the TV Settings

• Check that the HDMI ARC function is enabled in the TV settings.
  
  
• Check that the TV's audio output is set to the connected WiiM device.
  
  
• Check that the TV's audio format is set correctly.

• For the WiiM Amp Pro and WiiM Ultra,  check that the TV's audio format is set to Stereo PCM or Dolby Digital.
  
  
• For the WiiM Pro, WiiM Pro Plus, and WiiM Amp, check that TV's audio format is set to Stereo PCM. For instructions, refer to General Guide to Setting Digital Audio Output to PCM for Various TV Brands.

Step 3. Check Source Input of Your WiiM Device

1. Open the WiiM Home app.
   
   
2. Go to the Browse tab.
   
   
3. Check that the TV input is selected in the Source Input section.
   

By following these steps, you should be able to resolve issues with no sound when using a TV as an input source. If the problem persists, please contact WiiM Support for further assistance.