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Vizio TV Keeps Switching Inputs: How to Fix It

I recently encountered an issue with my Vizio TV that had me feeling pretty frustrated: it kept switching inputs on its own! After some research and trial and error, I was able to fix the problem. In this blog post, I’ll be sharing the tips and tricks I used to get my TV working properly, as well as other solutions that I discovered while researching.

The main reason your TV jumps from one input to another is the signal coming from your source device. It can be incompatible or weak. In either case, your Vizio TV will look for a supported device or one with better signal strength.

4 Reasons Why Vizio TV Keeps Switching Inputs and How To Fix

Your Vizio TV supports multiple source devices. These inputs include set-top boxes, multimedia players, and game consoles.

However, you may encounter issues like frequent input changes. Below are four reasons why this happens:

  1. Weak Signal

Plugging multiple devices at the same time can lead to input switches. This occurs when your intended source gives intermittent and weak signals. The unsteady connection prompts your TV to read the device with a stronger signal.

So, what causes these weak signals? Sometimes, it’s a simple loose connection that needs to be secured. Other times, it’s a twisted cable that needs to be straightened out.

Use Fully-Functioning Cables

Make sure that cables aren’t damaged when connecting devices. Also, ensure that they’re snapped in place at both ends.

Clean Ports and Cables

Dirt and dust accumulation on your TV’s port can interfere with and weaken signals. So, you need to carry out some routine cleaning on your devices to prevent this from happening.

Modify Input Setting

Searching for inputs with stronger signals is enabled due to the Automatic mode on your “Input at Power On” setting. 

Users have noticeably experienced this with the firmware update in 2021. Newer Vizio models with Smartcast are programmed to switch to this input once the previous source disconnects.

To fix the issue, change the input setting from Automatic to other modes. The options include “Previous Input” for when you want to go back to the most recent input. Nevertheless, you can select the specific input you want to display.

Here’s how you can modify your setting:

  1. First, go to “System” on your Menu.
  2. Next, click on “Input at Power On.”
  3. Then, scroll through the options and select your desired input setting.
  4. Lastly, exit the menu and restart your TV.
  5. Incompatible Signal

An incompatible signal from a source device can prevent content from loading. As a result, your TV will look for a compatible source.

An incompatibility usually signifies a resolution difference between the source and your TV’s output.

Take, for example, a source picture at 1080p and your TV set to 720p. If your Vizio’s video output resolution is set to automatic, your TV will adjust the signal to match the desired display. In some cases, the scaling and reframing may fail and hence, the incompatibility.

Modify Resolution

You can resolve the issue by modifying the settings on your TV, the source, or both. For the source device, you may need to consult its user manual on how to do this.

With your TV, you simply need to go to your Video Output Settings. Click on ‘Resolution’ and select the suitable option.

  1. Unsupported HDMI Device and Connection

An unsupported device is a likely reason why your TV cycles through inputs. Due to backward compatibility, the latest versions of HDMI inputs can work with older TVs. However, software for newer TVs won’t support outdated HDMI devices.

Update Source Device Software

If it helps, try updating the software of your source device and see if the problem is resolved. Otherwise, you may need to acquire a replacement.

Ensure Port and Cable Compatibility

It’s also possible that the source is plugged into the wrong port. Newer Vizio TVs have five HDMI slots available at most. Some of these options are designed for higher resolution inputs or refresh rates.

To maximize the source features, make sure that it’s on the right port. Plus, remember to get a cable that supports your device’s capability.

  1. Errors and Bugs

There may be other reasons why your TV changes inputs. This includes having errors and bugs in the system.

Install Firmware Updates

Firmware updates can fix errors and make your device more secure. Check if you have the latest version. Otherwise, install updates.

Reset your Vizio TV

Doing a soft reset on your device can sometimes resolve issues. You only need to remove source connections, then unplug the TV

Wait for about 60 seconds before powering your TV back on and reconnecting the inputs. If the problem persists, you may be left with no choice but to do a factory reset.


Your Vizio TV keeps switching inputs when it’s unable to read a compatible signal or when a weak signal comes off the selected source.

To prevent this from happening, the “Input at Power On” and “Video Output Resolution” settings need to be changed from “Automatic” to suitable options.

Additionally, plug-in sources into the correct port and set them to a resolution matching the TV’s output. All cables need to be in proper condition and support the full capabilities of the device. 

Lastly, regularly clean your device, particularly the ports, to avoid signal interference.