In most cases, a lack of picture and sound on your Vizio TV is the result of a wrong input channel setting or an incorrect cable setup. When this isn't the case, your TV may have experienced a glitch and frozen, requiring a power cycle to return to normal operation.
Unpowered Input Device
Check to make sure the device you're trying to use with your TV is plugged in and turned on. While it may seem like a silly oversight, it is possible that you switched on your TV and didn't actually turn on your DVD player, gaming console or whatever device you're trying to enjoy. If you tried to use a remote to turn on the device, check that the batteries still have a charge and turn on the device using its built-in power button.
Wrong Input Channel
Make sure that your TV is on the right input channel for the device you're trying to use. When your TV isn't switched to the right channel, no visual or audio input from the device will display on your screen or through your speakers. Turn on the input device and press the Input button on your remote to cycle through your input channels until you see the device's display on your screen.
AV Connection Problems
If you're on the right input channel and your device is turned on, there may be a problem with the physical connection between the device and your TV. Make sure that all cable connections are secure, and also that all cables are connected to the In ports on your TV and the Out ports on your input device. If you're using a connection that has color-coded plugs, make sure the connectors are inserted into their appropriate color-coded ports.
If you're using an HDMI connection, make sure that the cable you're using is compliant with High-bandwidth Digital Content Protection, especially if your TV and input device are both HDCP-enabled. HDCP is a copy protection system that prevents the copying of digital video and audio content as it travels over the connection. Systems connected with non-compliant cables won't display any video or audio content.
Periodically a TV may freeze up, showing that it's still turned on but not actually displaying any information from your input device or the TV's menu system. To fix a freeze, power cycling is the best solution.
Turn off the TV by pressing and holding the Power button on the cabinet until the TV powers down.
Unplug the TV from the wall power outlet.
Press and hold the Power button on the cabinet for 30 seconds, and then release it.
Plug the TV back in and turn it back on using the Power button on the cabinet or your remote control.
Hardware or Software Fault
If everything is correctly set up, powered on and on the right channel and you still aren't getting any picture or sound, there may be a hardware or software fault in your TV. The best way to check is to press the menu button on your TV or remote and see if the on-screen menu appears. If the menu doesn't appear, contact Vizio customer support at 1-855-833-3221 for more detailed diagnosis and repair instructions.