Samsung TV & Audio QN65QN90CAFXZA 65" Class QN90C Neo QLED 4K Smart TV WIFI MODULE FAIL Error Fix: Wi-Fi / Bluetooth Module Failure

Error code WIFI MODULE FAIL on the Samsung TV & Audio QN65QN90CAFXZA 65" Class QN90C Neo QLED 4K Smart TV means: Wi-Fi / Bluetooth Module Failure. Internal Wi-Fi/Bluetooth module can fail. Symptoms: no networks detected, immediate connection drops, "Wi-Fi is turned off" with no enable option, or Bluetooth pairing fails. On some Samsung models, Wi-Fi module is a separate replaceable board ($20-50). On others, wireless chipset is integrated into main board. Try network reset and factory reset before assuming hardware failure. USB Ethernet adapter ($10-15) provides reliable wired workaround. Bluetooth failure typically requires module or main board replacement.

The most successful fix is "Replace Internal Wi-Fi/Bluetooth Module Board" (hard difficulty, ~60 minutes). Estimated DIY cost: $20-$50. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Internal Wi-Fi/Bluetooth Module Board") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Plastic pry tools, Anti-static wrist strap.

DIY cost: $20-$50. 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 WIFI MODULE 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.