Vizio manufactures and produces LED and LCD high definition televisions, ranging in sizes from less than 20 inches to more than 50 inches. Vizio HDTVs often have several input options, including component, HDMI, composite, S-Video and VGA, allowing you to connect multiple components to the device, such as a DVD player, gaming console and cable box. If you are having trouble receiving signal from a device connected to your Vizio television, there are a few steps you can take to determine the source of the problem. Once the source of the problem is determined, proper steps can then be taken to remedy the problem.
Ensure that all cables are securely and completely inserted into their jacks. A half-way inserted cable will cause a signal to be distorted or completely disrupted.
Check that the Vizio HDTV is set to the correct input channel, and that television and the external component are both powered on. To select the input channel, press the "Input" or "Source" button on the Vizio's remote control.
Test the functionality of another component connected to a different input on the HDTV to determine if the problem lies within the television itself. For example, if both your cable box and DVD player are connected to the Vizio, and the cable box is signal is not being displayed, turn on the DVD player and switch the television to the input to which the DVD player is connected. This can be done by pressing the "Input" or "Source" button on the remote. If the DVD player (or other component) functions properly, then the television may not be the source of the problem.
Change the input of the malfunctioning device. For example, if the cable box connects to the Vizio HDTV through the "HDMI 1" input, remove the HDMI cable from the "HDMI 1" input and insert it into the "HDMI 2" input. Set the television to the "HDMI 2" input using the "Source" or "Input" button on the remote to determine if the input on the Vizio HDTV is the source of the problem.
Change the cable used to connect the component to the television. For instance, if you are using a VGA cable to connect your computer to the Vizio HDTV, disconnect the VGA cable from both the computer and the Vizio, and replace it with a different VGA cable. Doing so will determine whether the original cable has gone bad.
Connect another known-to-be-functioning device to the input channel on which you are not receiving signal. For instance, if your cable box is not functioning while plugged into the "HDMI 1" input, remove it and plug a known-to-be-functioning DVD player into the "HDMI 1" input. If the DVD player functions properly, the problem may reside within the cable box.
Connect the device that is not working to a known-to-be-functioning television to determine if the device is causing the signal loss.