LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV IR SENSOR FAIL Error Fix: IR Sensor Board Failure

Error code IR SENSOR FAIL on the LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV means: IR Sensor Board Failure. Infrared sensor board receives signals from IR remote and houses standby power LED. If TV doesn't respond to IR remote but power button on TV works, IR sensor board may have failed. Located at bottom edge of TV. Check for loose ribbon cable to main board. IR sensor boards are model-specific but inexpensive ($10-30).

The most successful fix is "Replace IR Sensor Board Assembly" (medium difficulty, ~45 minutes). Estimated DIY cost: $15-$30. HomeMD has 2 community-ranked fixes for this error.

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Replace IR Sensor Board Assembly") is rated medium difficulty and takes about 45 minutes. Tools needed: T15 Torx screwdriver, Plastic pry tool, Anti-static wrist strap.

DIY cost: $15-$30. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV has 8 other known error codes, including: ABNORMAL TEMP (OLED Panel Over-Temperature), APP CRASH (App Freezes or Crashes), AUDIO SYNC (Audio Out of Sync with Video), BANDING (Horizontal or Vertical Banding), BLINK 2X (Power Supply Overcurrent / Short), and 3 more.

Error code IR SENSOR FAIL also appears on 6 other LG TV & Audio models: 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV, 75NANO75UQA 75" Class NanoCell 75 Series 4K Smart TV, 86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV, OLED65C3PUA 65" Class C3 4K OLED evo Smart TV, OLED65C4PUA 65" Class C4 4K OLED evo Smart TV, OLED65G3PUA 65" Class G3 4K OLED evo Gallery Edition Smart TV. The fix may vary by model, so check each model's specific page for tailored repair steps.