CAPACITOR FAIL
LG TV & Audio · 86QNED80URA 86" Class QNED80 4K QNED MiniLED 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 86QNED80URA 86" Class QNED80 4K QNED MiniLED 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
App Freezes or Crashes
Audio Out of Sync with Video
Backlight Bleeding / Clouding
LED Backlight Strip Failure — No Picture
LED Backlight Strip Physical Failure
Horizontal or Vertical Banding
Power Supply Overcurrent / Short
Main Board Failure
The LG TV & Audio 86QNED80URA 86" Class QNED80 4K QNED MiniLED 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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