CAPACITOR FAIL
LG TV & Audio · OLED55B3PUA 55" Class B3 4K OLED Smart TV
Electrolytic capacitors on power supply or main board develop bulging tops, leaked electrolyte, or vented seals from age, heat, and electrical stress. #1 cause of "TV won't turn on" failures in TVs 3-8 years old. Visually inspect — healthy caps have flat tops. Replace all bulging/leaking capacitors. Use 105°C-rated replacements in high-heat areas.
Error CAPACITOR FAIL on the LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV means: Capacitor Failure (Bulging Caps). The top-ranked community fix is “Replace All Bulging or Leaking Capacitors on Power Supply Board” (hard difficulty, ~90 min, DIY cost: $15-$25). 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: $150-$250.
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 OLED55B3PUA 55" Class B3 4K OLED Smart TV has 8 other known error codes:
Error code CAPACITOR FAIL also appears on 6 other LG TV & Audio models:
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