Samsung TV & Audio QN65QN90CAFXZA 65" Class QN90C Neo QLED 4K Smart TV SCREEN FLICKER Error Fix: Screen Flickering or Flashing

Error code SCREEN FLICKER on the Samsung TV & Audio QN65QN90CAFXZA 65" Class QN90C Neo QLED 4K Smart TV means: Screen Flickering or Flashing. Entire screen or areas flicker, flash to black, or rapidly change brightness. Causes include: failing backlight LEDs or LED driver (LED-based TVs), loose ribbon cables, failing T-CON board, or incorrect picture settings. Disable Brightness Optimization: Settings → General → Power and Energy Saving → Brightness Optimization → Off. Also disable Motion Lighting. Try different HDMI inputs to isolate. If flicker is on the internal Picture Test, suspect internal hardware — check power supply capacitors for voltage ripple.

The most successful fix is "Inspect and Replace T-CON Board or Power Supply Capacitors" (medium difficulty, ~75 minutes). Estimated DIY cost: $0-$25. HomeMD has 2 community-ranked fixes for this error.

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Yes — the top-ranked community fix ("Inspect and Replace T-CON Board or Power Supply Capacitors") is rated medium difficulty and takes about 75 minutes. Tools needed: T10 Torx screwdriver, Phillips screwdriver, Multimeter, Soldering iron (if capacitor replacement).

DIY cost: $0-$25. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

The Samsung TV & Audio QN65QN90CAFXZA 65" Class QN90C Neo QLED 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 SCREEN FLICKER 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, QN65S90CAFXZA 65" Class S90C OLED 4K Smart TV, UN55CU8000FXZA 55" Class CU8000 Crystal UHD 4K Smart TV. The fix may vary by model, so check each model's specific page for tailored repair steps.