Samsung TV & Audio QN55LS03BAFXZA 55" Class The Frame QLED 4K Smart TV NO SIGNAL Error Fix: HDMI No Signal Detected

Error code NO SIGNAL on the Samsung TV & Audio QN55LS03BAFXZA 55" Class The Frame QLED 4K Smart TV means: HDMI No Signal Detected. The TV displays "No Signal" on the selected HDMI input. Check that the external device is powered on and outputting video. Try a different HDMI cable — use certified Premium High Speed HDMI for 4K@60Hz or Ultra High Speed for 4K@120Hz. Try a different HDMI port on the TV. On Samsung TVs, enable Input Signal Plus for the HDMI port: Settings → General → External Device Manager → Input Signal Plus → enable for the port in use (required for 4K HDR signals). Disconnect and reconnect the cable firmly at both ends.

The most successful fix is "Replace HDMI Board or Internal HDMI Port Assembly" (medium difficulty, ~60 minutes). Estimated DIY cost: $15-$25. 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 HDMI Board or Internal HDMI Port Assembly") is rated medium difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Anti-static wrist strap, Plastic pry tool.

DIY cost: $15-$25. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

The Samsung TV & Audio QN55LS03BAFXZA 55" Class The Frame 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 NO SIGNAL also appears on 4 other Samsung TV & Audio models: 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, 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.