Start With the Simple Audio Checks
Make sure the TV is not muted and raise the volume using the buttons on the television itself. Open the audio settings and confirm the output is set to the TV speakers rather than Bluetooth, optical audio, ARC/eARC, or an external receiver.
Test More Than One Source
Try a built-in streaming app, another HDMI input, and an over-the-air or tuner source if available. If only one device has no sound, the source device, cable, or audio-format setting may be the cause.
Check Digital Audio and HDMI Settings
ARC/eARC, CEC, pass-through, and digital-audio format settings can affect sound. Temporarily return audio output to the TV speakers and use a basic PCM setting when troubleshooting an external device.
When the Speakers May Be the Problem
Buzzing, crackling, distortion, or sound that returns when one speaker is disconnected can point toward a speaker or wiring issue. With power disconnected, inspect accessible speaker plugs and wiring for obvious damage.
When the Main Board Becomes a Stronger Suspect
On many modern TVs the main board handles audio decoding, HDMI audio, Bluetooth, and the amplifier signal path. If every source is silent, settings are correct, and the speakers and wiring appear intact, a main-board fault becomes more plausible.
Match the Exact Replacement Board
Do not order a main board only from the TV model. Manufacturers often use multiple board revisions in the same model family. Match the complete assembly or service part number from the original board.
How to Find the Correct TV Board Part Number
Tested Replacement TV Parts
Short Circuit Solution stocks tested used TV boards and components backed by our 180-Day Warranty.
Need Help With Your Repair?
Send us the complete TV model number, a clear description of the symptom, and photos of the original board labels if you need help identifying the correct replacement part.
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Safety note: Disconnect the television from power before accessing internal components. TVs can contain hazardous voltages and fragile circuitry.