Volume check
Don't forget, the volume setting may affect your viewing experience. Move the remote control to see if the volume has been turned down unintentionally.
Speaker test
Try connecting the TV with headphones or speakers. If the sound is normal, the speaker may need to be repaired or replaced.
Input source check
Try changing the input source, such as switching to DVD or game machine, to see if it is the current source.
Telegraph certificate
If you connect a speaker or stereo system, please check whether the cable is intact. Sometimes, a small crack can lead to silence.
Restart Dafa
Tv and related equipment can be "stupid" sometimes, and restarting may solve the temporary failure.
Software update
Make sure your TV firmware or driver is up to date, and software updates may bring sound repair.