Samsung TV & Audio QN65QN90CAFXZA 65" Class QN90C Neo QLED 4K Smart TV T-CON BOARD FAIL Error Fix: T-CON Board Failure

Error code T-CON BOARD FAIL on the Samsung TV & Audio QN65QN90CAFXZA 65" Class QN90C Neo QLED 4K Smart TV means: T-CON Board Failure. Timing Controller board translates video signal into pixel-level control for the panel. Symptoms: vertical lines, horizontal lines, distortion, washed-out colors, double images, or half screen dark. Located between main board and panel, connected by ribbon cables. On Samsung TVs, typically a small board with metal heat sink near top edge of panel. T-CON replacement is cost-effective — $30-100. Replace involves removing back cover, disconnecting ribbon cables and power connector, swapping board.

The most successful fix is "Replace the T-CON Board" (hard difficulty, ~45 minutes). Estimated DIY cost: $30-$100. 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 ("Replace the T-CON Board") is rated hard difficulty and takes about 45 minutes. Tools needed: Phillips screwdriver, Plastic spudger.

DIY cost: $30-$100. 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 T-CON BOARD 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, 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.