BACKLIGHT FAILURE
LG TV & Audio · 86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV
TV has audio and backlight briefly flashes on startup, then screen goes dark. Flashlight against screen reveals faint picture. A single failed LED on a strip disables entire strip or LED driver shuts down all backlights. Repair requires complete disassembly to access LED strips behind LCD panel. LED strip replacement kits $20-60. Most common LED TV repair.
Error BACKLIGHT FAILURE on the LG TV & Audio 86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV means: LED Backlight Strip Failure — No Picture. The top-ranked community fix is “Replace LED Backlight Strip Assembly” (hard difficulty, ~120 min, DIY cost: $50-$70). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · tv
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many tv repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $200-$350.
App Freezes or Crashes
Audio Out of Sync with Video
Backlight Bleeding / Clouding
LED Backlight Strip Physical Failure
Horizontal or Vertical Banding
Power Supply Overcurrent / Short
Main Board Failure
Inverter / Backlight Driver Failure
The LG TV & Audio 86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV has 8 other known error codes:
Error code BACKLIGHT FAILURE also appears on 2 other LG TV & Audio models:
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