TV Showing Vertical Lines, Bands, or Half a Picture? Here’s What It Means

You sit down for the Dolphins game, turn on the TV, and something's wrong. There are thin lines running down the screen. Maybe a colored band. Maybe half the picture is dark and the other half looks fine. Your first thought is probably, "Do I have to buy a new TV?"

The good news: not always. Some of these problems are an affordable repair worth doing, especially on a big-screen LED, OLED, or QLED that's otherwise in great shape. Tekno actually started in TV repair, so this is right in our wheelhouse. Let's walk through what these symptoms usually mean and a few safe things to check first.

First, a quick safety note

Please don't open the back of your TV. Even unplugged, a flat-screen can hold stored high voltage inside, and that's genuinely dangerous. Every check below is something you can do from the outside.

Safe checks you can do at home

• Try a different input and cable. Switch HDMI ports, swap in a different HDMI cable, and try a different source (cable box, streaming stick, console). A bad cable or failing device can throw lines and odd colors onto an otherwise healthy screen.
• Power-cycle the TV. Unplug it for a full 60 seconds, then hold the power button on the TV (not the remote) for about 15 seconds while it's unplugged. Plug it back in.
• Check the built-in menu. Open the TV's own settings menu or built-in apps. If the lines show up there too, the problem is the TV itself, not your cable box or streaming device. If the menu looks perfect, the trouble is upstream.
• Look gently for damage. Check whether anything has pressed against the screen or if there's an obvious crack. Don't push on it — just look it over with good lighting.

What the symptoms usually mean

Thin lines, or half the screen dark

Fine lines across the picture, or one half gone dark while the other works, often point to the T-CON board or the ribbon-cable connections that link it to the panel — the parts that tell the screen how to draw the picture. This is frequently repairable.

Colored vertical bands

Bands of color where they shouldn't be also tend to come from the T-CON board or the panel itself. Which one makes a real difference for cost, and that's something we'd confirm by testing the set directly.

A cracked panel

If the glass panel is physically cracked, that's the one case where repair usually isn't worth it — replacing the panel often costs as much as a new TV. We'll always tell you straight if that's where things stand.

Repair or replace? An honest answer

1. Cracked or physically damaged panel: usually replace the TV.
2. Board, backlight, or T-CON issues: often an affordable repair, well worth doing before you toss a perfectly good big-screen.

A factory-trained technician can usually tell which camp your TV falls into pretty quickly once it's in front of us. We work with upfront flat pricing, so you'll know the cost before any repair goes ahead, the diagnostic fee applies toward the repair, and the work comes with a 90-day warranty.

If your TV is showing lines, bands, or half a picture, don't write it off yet. Learn more about our TV repair service, or book a repair. You can also call (561) 533-9840 and the same trusted person will help you figure out the best path forward.