How to Finally Stop Annoying Flickering on Your Vizio TV

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Written by

Jason Lin
Jason Lin

Published on

All ArticlesVizio TV
Vizio TV Flickering

Flickering, flashing, blinking – whatever you want to call it, an unstable picture on your Vizio TV is downright annoying. But before you chunk it or call in the expensive pros, know that this problem is usually pretty easy to fix yourself.

After dealing with countless malfunctioning TVs over the years, I’ve discovered that Vizio flickering issues boil down to just a handful of common causes. With a few basic troubleshooting steps, you can stop the headache and get back to watching your shows.

In this comprehensive guide, I’ll walk you through the troubleshooting process to determine exactly why your Vizio flashes on and off or displays horizontal/vertical lines. I’ll also provide simple step-by-step instructions to try on your own, before you resort to replacing parts or buying a new TV.

What Causes Vizio TV Screen Flickering?

Before jumping into fixes, it helps to understand what makes a Vizio TV picture start flickering in the first place. The most common culprits include:

Software Bugs

Like any gadget running complex software, Vizios can experience crashes, laggy performance, freezes, black screens, and visual distortion from coding flaws. Power cycling usually resolves software issues.

Backlight Failure

Vizio LCD screens use LED backlighting systems to illuminate the actual LCD panel. But these LED strips can overheat, lose voltage, or simply burn out over time.

Bad Power Regulation

A failing voltage regulator preventing consistent power flow to the backlights manifests as random off/on blinking.

Loose Connections

Unstable connections anywhere along the video processing pathway – from a jostled HDMI input to a dusty circuit board contact – introduces signal noise.

Outdated Firmware

Firmware patches aim to fix bugs that cause flickering. Failing to update leaves you exposed.

Failing Hardware

With age, components like power supply boards, inverters, and even the LCD panel itself eventually wear out and need replacement.

Now let’s get into the fixes!

Step 1: Power Cycle Your Vizio TV

Start simple – surprisingly often, just restarting your Vizio TV will stop the flickering. Glitchy software can manifest unpredictable symptoms like screen flashing. Power cycling forces a cold reboot, clearing any temporary memory crashes.

Follow these steps exactly:

  • Fully unplug TV power cord from wall outlet
  • Press and hold physical power button on TV (not remote) for 30-60 seconds to discharge remaining energy
  • Leave unplugged for 1-2 minutes minimum
  • Plug power cord back into outlet and test
Unplug The TV

If the blinking persists, don’t lose hope. More likely than not the issue lies elsewhere, so continue down the troubleshooting list.

Step 2: Check Vizio Picture Settings

Before getting into hardware, improperly configured picture settings could be causing your particular flavor of flickering.

Navigate using remote:

Picture Mode > Picture Mode Settings > More Picture Settings

Vizio Tv More Picture Settings

Under this advanced menu, disable/reset features known to sometimes conflict, inducing blinking or distorted video:

  • Clear Action Motion Control
  • Active Full Array
  • Dynamic Contrast
  • Black Detail Settings

Still seeing intermittent black screens on your Vizio? Flickering limited to specific content types like gaming or movies? Play around with preset picture modes as well:

Settings Wheel > Picture Mode > Calibrated / Game / Movie / Vivid

Vizio Tv Picture Mode

Customized options tend to cause more issues than balanced presets. Calibrated Dark also helps compensate for failing LED backlights.

Step 3: Reseat Loose HDMI & AV Cables

Don’t overlook something simple – a slightly loose HDMI or coaxial input easily causes glitchy picture and blinking screens. Video signals are highly sensitive!

  • Inspect condition of all plugged in cables behind TV
  • Disconnect and firmly reseat each HDMI/AV cable
  • Power cycle devices to reestablish signal handshake
Tcl Tv Hdmi

While you’re back there, confirm all side panel input ports are free of dust buildup. Clean gently using compressed air if dirty.

Loose inputs account for an astounding number of cases where “my Vizio TV turns off and on randomly.”

Step 4: Update Outdated Vizio Firmware

Everyone knows to keep phones and computers up-to-date. Well, your Vizio Smart TV software needs attention too!

Failing to upgrade Vizio TV firmware leaves you vulnerable to known bugs that induce:

Luckily, updating is easy.

Vizio Smart TV (SmartCast OS)

Recent Vizio models automatically install updates if connected online. Enable auto-updates:

Settings > System > System Update

Select “Auto Update” checkbox to continuously patch bugs.

Non-Smart Vizio TV

Manually check for system firmware updates:

Onscreen Menu > System > Check for Updates

Vizio Tv Check For Updates 1

Install any available patches. Your Vizio will auto-restart when finished.

Still exhibiting quirky behaviors after updating? Reset your TV using one of the next methods.

Step 5: Factory Reset Vizio TV

When all else fails, restoring factory default settings often resolves software-related flashing by fully reinstalling the operating system.

Yes, a factory reset erases saved video sources and custom preferences like Vizio TV remote pairings. But would you rather constantly fight screen flickering? I promise it’s worth it.

On SmartCast TVs:

  • Simultaneously press “Volume Down + Input” buttons
  • Follow prompts to reset
Hard Reset A Vizio Tv Without Remote

Non-Smart Vizios:

Onscreen Menu > System > Reset & Admin > Reset TV to Factory Defaults

Vizio Tv Reset & Admin
Vizio Tv Reset Tv To Factory Defaults

Perform full initialization using remote prompts. Expect TV to automically restart itself twice when finished.

Give the reset a couple days to re-stabilize before passing final judgement on its effectiveness.

Step 6: Inspect Failing Hardware

Warning – attempting DIY repairs inside invalidates warranties due to risk of electric shock and damaging components. If your Vizio is under coverage, request service instead. Know your limits!

That said, inspecting internal hardware provides valuable troubleshooting insight before replacing entire TVs.

Common culprits like the Vizio SmartCast system not working properly or a Vizio remote not working to control essential functions.


LED backlight systems allow LCD components to actually display images. But continually pushing LEDs with high current eventually degrades connections and bulbs. Result? Flickering or blinking screens when voltage dips.

Inspect backlight ribbon cables for any corrosion or loose connectors. Meticulously re-seat each fastener and clean gently using alcohol if corroded. Replace strips testing faulty with a multimeter.

Don’t just immediately assume the LEDs themselves have burned out – often it is merely a flaky solder joint you can resolder yourself with basic equipment.


The various processing boards translate video input signals and power critical systems. But wear, dust contamination, and general aging frequently upsets signal transmission. Malfunction manifests as unpredictable blacking out or distorted, uneven images.

Closely check solder points, cable connections, and chipsets on following boards:

  • T-Con Board – Translates signal into images
  • Main Board – Primary video/data interface
  • Power Supply – Regulates electricity

LCD Panel

Eventually the LCD layer generating images degrades with age, producing artifacts like screen blinking only fixable by replacing entire fragile component.

But this is among the LAST resorts – confirm you’ve inspected everything else first, as panel issues rarely cause intermittent blinking.

When Should I Call Vizio Support?

Before shelling out $100s on replacement parts or new TVs, exhaust other options – especially if under 1 year factory warranty.

Contact Vizio customer support if:

  • TV under coverage – describe issue for free diagnosis/repairs
  • Unsure how to safely access internal hardware
  • Lack proper tools for electrical work
  • Parts replacement unsuccessful

Phone: (877) 698-4946


Vizios may develop quirks over years of usage. But properly trained technicians can accurately troubleshoot problems and ensure full fixes.

Vizio TV Flickering FAQs

Still seeking specific answers about Vizio blinking screen issues? Here I tackle the most common questions directly.

Why does my Vizio TV turn off and on randomly?

Frequent automatic power cycling normally stems from faulty HDMI handshakes when devices reconnect. Here are some top fixes:

  • Try a different HDMI input port
  • Using universal Vizio TV remote codes for better compatibility
  • Use newer HDMI cables rated for 4K/HDR
  • Toggle HDMI Device Link settings
  • Factory reset Vizio TV

My Vizio smart TV screen is black but sound works

This points to backlight failure rather than display panel damage. LEDs generate the required brightness, so when they burn out, images disappear. Potential fixes:

  • Try Brightness/Backlight settings
  • Replace LED backlight strips
  • Resolder connectors
  • Rule out T-Con board failure

Why does Vizio TV flicker every few seconds?

Brief but repeating screen blinking strongly indicates the voltage regulator failing to provide steady power to LED backlights. Replace failing capacitors on power supply board.

How do I stop horizontal lines on my Vizio TV?

Horizontal lines suggest wiring problems with screen buffers/multiplexers. Issues to address:

  • Check T-Con board cables
  • Replace HDMI/AV cables
  • Try different video sources
  • Ruling out panel bonding glue issues

What should I do if TV screen keeps flashing different colors?

Multicolored flickering without obvious patterns likely means a totally failed T-Con board component. Solution: Replace T-Con board ensuring proper cables reattachment.

Still have questions about resolving your Vizio TV issues? Drop them in the comments section!