LED TV backlight repair
For LED TVs whose screen has gone dark, patchy or flickers while the sound still works. Tell us the brand and screen size when you book.
- Visit charge: told to you on the call, before we visit
- Warranty: 90 days on the work done
Can an LED TV backlight be repaired?
Yes, in most LED TVs. The backlight is a set of LED strips behind the screen. When one LED fails, the whole strip often goes dark, because the LEDs are wired in a chain. The technician opens the TV, tests the strips and replaces them, which costs much less than a new panel.
Price: Quote after diagnosis
Signs of a backlight fault
When the TV senses a fault in the backlight, it often switches the light off to protect itself. That is why some sets show a picture for a moment and then go dark.
- Sound works but the screen is black. A torch held close shows a faint picture
- Dark patches, or one part of the screen dimmer than the rest
- The picture comes on for a few seconds, then the screen goes dark
- The screen flickers, or the brightness has dropped over time
Why backlights fail
The LEDs run hot, and heat wears them out over the years. Long hours at very high brightness, poor air flow round the TV, and voltage spikes all add to this. As the strips are the same age, when one fails the others are often close behind.
- Keep the brightness at a comfortable level, not always at maximum
- Leave space behind the TV for air
- Use a spike guard on the TV socket
Why it is a job for a technician
To reach the strips, the whole screen has to be taken apart: the panel, then the thin sheets that spread the light. The panel cracks easily, and dust caught between the sheets shows as spots on the picture. It needs care and the right tools.
What the technician does
- ConfirmDoes the torch test and checks the backlight driver on the power board.
- QuoteTells you the price before opening the screen.
- ReplaceOpens the panel, tests each strip, and replaces the failed strips. We usually advise changing the full set, as the rest are the same age.
- Reassemble and testCleans the sheets, closes the panel, and runs the TV to check the brightness is even.
Questions
Is a backlight repair covered by a warranty?
Our repair warranty is 90 days on the work done. The technician explains what it covers when you approve the repair.
The screen has lines, not darkness. Is that the backlight?
No. Lines or bars on the picture usually come from the panel or the T-con board, not the backlight. See our page on LED TV no display repair, or book a visit and describe what you see.
Last updated 2026-11-08
Book a technician
Pick the appliance, the problem and a time that suits you. It takes about two minutes. Or call and we will book it for you.