HALF SCREEN DARK
LG TV & Audio · OLED65C3PUA 65" Class C3 4K OLED evo Smart TV
One half of the screen is completely dark or significantly dimmer. Indicates failure of one LVDS ribbon cable connection between main board/T-CON and panel, partial backlight strip failure (LED/LCD), or failed gate driver section. Check ribbon cables first — reseat all connections between T-CON and panel.
Error HALF SCREEN DARK on the LG TV & Audio OLED65C3PUA 65" Class C3 4K OLED evo Smart TV means: Half of Screen Dark / No Image. The top-ranked community fix is “Replace Faulty T-CON Board or Backlight LED Strip” (hard difficulty, ~90 min, DIY cost: $50-$100). 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: $250-$400.
tv · 2 fixes
tv · 2 fixes
tv · 2 fixes
tv · 2 fixes
tv · 2 fixes
tv · 2 fixes
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 OLED65C3PUA 65" Class C3 4K OLED evo Smart TV has 8 other known error codes:
Error code HALF SCREEN DARK also appears on 6 other LG TV & Audio models:
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