If you have tested all the inputs, reset the settings to default, and updated the firmware, but the television remains silent, it may be time to look at the hardware. For older models, a failing capacitor in the audio board is a common reason why is the sound off on my tv , and while it is repairable, it requires technical knowledge.
Is Your TV Remote’s Mute Button Stuck? Here’s How to Fix It
You are looking to verify that the audio output is set to the correct port and that the television is not sending the signal to a dormant setting. This often solves the why is the sound off on my tv puzzle when dealing with Blu-ray players or set-top boxes.
If you recently switched to a new input source or a streaming stick, the TV might be trying to send sound to a "Speaker Out" port that has nothing plugged in. Changing this setting to "TV Speakers" or "Internal Speaker" usually restores the sound immediately.
Is the TV Remote Mute Button Stuck Silencing Your Sound?
Look for the mute icon, usually a speaker with a line through it, and ensure it is not active. Modern televisions have several settings that can cut the audio without you realizing it.
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