Samsung TV & Audio QN65S90CAFXZA 65" Class S90C OLED 4K Smart TV 5 BLINKS Error Fix: LED Backlight / Driver Protection Shutdown

Error code 5 BLINKS on the Samsung TV & Audio QN65S90CAFXZA 65" Class S90C OLED 4K Smart TV means: LED Backlight / Driver Protection Shutdown. The standby LED blinks 5 times, pauses, and repeats. This is the most commonly documented Samsung TV blink code. The LED backlight driver circuit has detected an open circuit or short circuit in the LED backlight strips and has shut down to protect itself. The TV may briefly turn on (Samsung logo may flash) before the backlight cuts out. Hold a flashlight against the screen — if a faint image is visible, the backlight has failed but the main board and T-CON are functional. A single failed LED on a backlight strip can cause the driver to shut down all strips. LED strip replacement requires complete TV disassembly. LED backlight strip kits cost $25-80 for most Samsung models. This is one of the most common Samsung TV repairs. Does not apply to Samsung OLED TVs.

The most successful fix is "Replace LED Backlight Strips" (hard difficulty, ~120 minutes). Estimated DIY cost: $30-$80. 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 LED Backlight Strips") is rated hard difficulty and takes about 120 minutes. Tools needed: Phillips screwdriver, Plastic pry tool, Multimeter.

DIY cost: $30-$80. Professional repair typically costs $200-$350. Many homeowners save money by trying the top-ranked community fix first.

The Samsung TV & Audio QN65S90CAFXZA 65" Class S90C OLED 4K Smart TV has 8 other known error codes, including: 2 BLINKS (Power Supply Board Fault), 6 BLINKS (Main Board / T-CON Communication Failure), ABL ISSUE (Automatic Brightness Limiter Reducing Brightness), ANYNET FAIL (Anynet+ (HDMI-CEC) Not Working), APP CRASH (App Freezes or Crashes), and 3 more.

Error code 5 BLINKS 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, 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.