How to Tell If an LCD TV Is Going Bad?

By Melissa King

Your LCD television is an expensive piece of electronic equipment, so you want your investment to last for a long time. LCD televisions, unfortunately, can fail for a number of reasons. An LCD television's picture relies on the strength of the backlight bulbs, for example, so over time, the picture starts to look dim. LCD televisions also contain capacitors or other components that can break. Damaged or failing LCD televisions exhibit several obvious signs that you can use to diagnose the problem.

Step 1

Turn on the LCD television. If the screen comes on for just a few seconds and then powers off, the TV's capacitors are likely failing.

Step 2

Look at the picture on the LCD screen. If it seems dim, an aging backlight is the probable cause. If the backlight fails completely, you won't see any picture. The television's manufacturer or a local repair shop can usually replace the backlight.

Step 3

Check the screen for small, black spots. If the spots don't move and they appear unlit, they are probably dead pixels. Dead pixels are defects in the glass sheet behind the screen.

Step 4

Move the television around slightly if you cannot get a picture. If moving the television results in a picture, one of its cables is failing. A failing cable also results in a flickering image or scrolling lines on the screen.

Tips & Warnings

  • If you think your LCD television is failing or damaged, contact the manufacturer. If the TV is covered by a warranty, many repairs are free.