HDCP ERROR
LG TV & Audio · OLED65C4PUA 65" Class C4 4K OLED evo Smart TV
High-bandwidth Digital Content Protection authentication between the TV and external device failed. The TV may show a black screen with HDCP error message. Check HDMI cable quality. Use Premium or Ultra High Speed certified cables. Power cycle both devices. Try a different HDMI port. Update firmware on both devices. Disable and re-enable HDMI-CEC (SimpLink).
Error HDCP ERROR on the LG TV & Audio OLED65C4PUA 65" Class C4 4K OLED evo Smart TV means: HDCP Handshake Failure. The top-ranked community fix is “Update Firmware and Adjust HDMI-CEC Settings” (medium difficulty, ~30 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: $100-$150.
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 OLED65C4PUA 65" Class C4 4K OLED evo Smart TV has 8 other known error codes:
Error code HDCP ERROR also appears on 6 other LG TV & Audio models:
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