Samsung TV & Audio UN55CU8000FXZA 55" Class CU8000 Crystal UHD 4K Smart TV POWER SUPPLY FAIL Error Fix: Power Supply Board Failure

Error code POWER SUPPLY FAIL on the Samsung TV & Audio UN55CU8000FXZA 55" Class CU8000 Crystal UHD 4K Smart TV means: Power Supply Board Failure. Converts AC mains (120V) to DC voltages (+12V, +5V, +3.3V, +1.8V, LED driver voltage). Symptoms: no standby LED, powers on then immediately off, 2-blink pattern, intermittent cycling, or buzzing. #1 cause is degraded electrolytic capacitors — inspect for bulging tops, leaked electrolyte, vented seals. Capacitor replacement $20-50 in parts vs. $80-200+ for full board. Samsung TV power supply boards are model-specific but available from parts suppliers.

The most successful fix is "Replace Degraded Electrolytic Capacitors on Power Supply Board" (hard difficulty, ~90 minutes). Estimated DIY cost: $20-$50. 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 ("Replace Degraded Electrolytic Capacitors on Power Supply Board") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Soldering iron, Desoldering braid, Multimeter.

DIY cost: $20-$50. Professional repair typically costs $120-$200. Many homeowners save money by trying the top-ranked community fix first.

The Samsung TV & Audio UN55CU8000FXZA 55" Class CU8000 Crystal UHD 4K Smart TV has 8 other known error codes, including: 2 BLINKS (Power Supply Board Fault), 5 BLINKS (LED Backlight / Driver Protection Shutdown), 6 BLINKS (Main Board / T-CON Communication Failure), ANYNET FAIL (Anynet+ (HDMI-CEC) Not Working), APP CRASH (App Freezes or Crashes), and 3 more.

Error code POWER SUPPLY FAIL also appears on 4 other Samsung TV & Audio models: QN55LS03BAFXZA 55" Class The Frame QLED 4K Smart TV, QN65Q80CAFXZA 65" Class Q80C QLED 4K Smart TV, QN65QN90CAFXZA 65" Class QN90C Neo QLED 4K Smart TV, QN65S90CAFXZA 65" Class S90C OLED 4K Smart TV. The fix may vary by model, so check each model's specific page for tailored repair steps.