If your Vizio TV has a normal picture but no sound, start with the audio path before replacing a board. The source device, audio settings, speakers, and main board can all produce the same symptom.
Rule Out Settings and Source Problems
Test more than one app or HDMI input. Confirm the TV is not muted, the speakers are enabled, and the audio output is not set exclusively to an external device.
Internal Speakers vs. Main Board
If headphones, Bluetooth audio, or an external sound system works while the internal speakers do not, the speaker circuit or speakers deserve attention. If there is no audio from any output, the main board becomes more likely.
Inspect the Speaker Connections
With power disconnected, inspect speaker plugs and wiring for loose connectors, pinched wires, or corrosion. Do not assume both speakers failed at the same time without testing the rest of the audio path.
When the Main Board Is Suspect
Audio processing is commonly handled on the main board. A failed amplifier section, damaged HDMI/audio circuitry, or software issue can cause sound loss while the picture remains normal.
Match Vizio Boards Carefully
Vizio board compatibility can depend on the exact assembly number and serial range. See our Vizio part-number guide before ordering.
Need Help With Your Repair?
If you are unsure which part you need, send us your TV model number, the exact part number from the original board, and a few clear photos. Our team can help you verify the match before you order.
Short Circuit Solution sells tested replacement TV parts backed by our 180-Day Warranty. We recommend matching by the original part number whenever possible instead of relying on appearance alone.
Safety note: Disconnect power before opening a TV. Power-supply sections can retain dangerous voltage after the set is unplugged. If you are not comfortable working around electronics, use a qualified technician.