![]() Put a small amount of epoxy onto some card or paper if it is pre-mixed, or if not pre-mixed, put each component onto separate parts of your card.Superglue is not recommended as it is not heat-stable. Simply glue the fallen diffuser lenses back over their LEDs using a clear epoxy, and the hot spots on your TV display will be fixed. Most Vizio TV backlight diffusers will be connected by three points to the LED strip. You will see a T-Con board for translating the signal into a TV picture, a power board, and a main board.Put the back panel somewhere out of the way and take a look at the circuit boards that have been revealed.It should come apart in two pieces: front and back. Open your TV by unscrewing the screws in the back panel.Make sure there is nothing that can scratch the screen on your work surface. Place your TV face down on a large table or workbench.There are large capacitors in the power board for the backlight and these can hold charge for an extended period of time. Unplug your TV, hold down the power button, and wait for at least 30 minutes.If you’re not confident doing this, then now is the time to get an expert. To access the boards, first remove the back panel. You can watch a quick overview of the fixes in my short video below, with more detail on each in the rest of this guide.Įither the LVDS cable connectors can come loose or get covered in grime or dust, preventing a clean contact or components on the boards can fail, meaning they don’t power the backlight sufficiently or cannot provide a constant picture signal. Your Vizio TV backlight issues can be fixed by replacing any failed components on your power board or by replacing your backlight strips where any individual LEDs have burned out. Edge LED failure causes vertical dark bands which can be fixed by replacing these backlights.ģ-Minute Troubleshooting for Vizio Backlight Problems ![]() Vertical Dark Patches Edge-lit TVs have one LED strip at the top and bottom of the panel. This can be stuck back on with epoxy if you open your TV’s case. Bright Patches The glue on the LED’s diffusers has failed. Faint Images Burned out backlight strips which can easily be replaced for a few dollars. No Backlight At All Failed components on the power board are most common. Backlight Flickering A failure on the power board or loose connection causes flickering. The Most Common Vizio TV Backlight Issues Common Issues Fixes Half the Screen has Gone Dark This is usually a poorly seated cable on the T-Con which can be fixed by cleaning the cable’s contacts and firmly re-inserting it.
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