LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV WONT TURN ON Error Fix: TV Does Not Power On — No LED

Error code WONT TURN ON on the LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV means: TV Does Not Power On — No LED. TV shows no signs of life — no standby LED, no response to remote or power button. Power supply board is not receiving or converting AC power. Check outlet, power cable connection. Most common cause internally is failed electrolytic capacitors (bulging or leaking) on power supply board, or blown fuse.

The most successful fix is "Test and Replace Failed Electrolytic Capacitors on Power Supply Board" (hard difficulty, ~60 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

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

Yes — the top-ranked community fix ("Test and Replace Failed Electrolytic Capacitors on Power Supply Board") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Phillips screwdriver, Multimeter with capacitance function, Soldering iron, Desoldering pump or braid.

DIY cost: $10-$20. Professional repair typically costs $120-$200. 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 WONT TURN ON 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.