OLED LINE DEFECT
LG TV & Audio · OLED65C4PUA 65" Class C4 4K OLED evo Smart TV
Thin bright or dark horizontal or vertical line appears on OLED panel. Originates from failed gate or source driver IC bonded directly to glass panel substrate — not repairable without panel replacement. If line only appears in certain colors or brightness levels, may be partial driver failure. LG has typically replaced panels under warranty for line defects.
Error OLED LINE DEFECT on the LG TV & Audio OLED65C4PUA 65" Class C4 4K OLED evo Smart TV means: OLED Panel Line Defect. The top-ranked community fix is “Replace the OLED Panel (Professional Repair)” (hard difficulty, ~180 min, DIY cost: $0). 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: $800-$1200.
OLED Panel Over-Temperature
App Freezes or Crashes
Audio Out of Sync with Video
Horizontal or Vertical Banding
Power Supply Overcurrent / Short
Main Board Failure
Inverter / Backlight Driver Failure
T-CON Board Communication Error
The LG TV & Audio OLED65C4PUA 65" Class C4 4K OLED evo Smart TV has 8 other known error codes:
Error code OLED LINE DEFECT also appears on 3 other LG TV & Audio models:
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