Samsung TV & Audio HW-S800B Ultra Slim 3.0 Channel 360 Watt Soundbar with Dolby Atmos and Bluetooth HDMI Error Fix: HDMI Input Mode — No Signal

Error code HDMI on the Samsung TV & Audio HW-S800B Ultra Slim 3.0 Channel 360 Watt Soundbar with Dolby Atmos and Bluetooth means: HDMI Input Mode — No Signal. Display shows "HDMI" indicating the HDMI input (non-ARC) is selected. The soundbar is expecting a direct HDMI input from a source device (Blu-ray player, game console) connected to the soundbar's HDMI IN port, with the soundbar's HDMI OUT (ARC) connected to the TV. If "No Signal" or no audio/video: verify cables are in correct ports (source → soundbar HDMI IN, soundbar HDMI OUT → TV ARC port). Check source device is powered on and outputting signal. Try a different HDMI cable. Enable HDMI passthrough in soundbar settings if available.

The most successful fix is "Enable HDMI Passthrough and Update Soundbar Firmware" (medium difficulty, ~45 minutes). Estimated DIY cost: $0-$10. HomeMD has 2 community-ranked fixes for this error.

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Enable HDMI Passthrough and Update Soundbar Firmware") is rated medium difficulty and takes about 45 minutes. Tools needed: Soundbar remote, Wi-Fi network.

DIY cost: $0-$10. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The Samsung TV & Audio HW-S800B Ultra Slim 3.0 Channel 360 Watt Soundbar with Dolby Atmos and Bluetooth has 8 other known error codes, including: ARC (HDMI ARC Input Mode — Connection Issues), ARC NO AUDIO (No Sound via HDMI ARC/eARC Connection), AUDIO DROPOUT (Audio Drops Out Intermittently), AUTO STANDBY (Soundbar Auto Powers Off After 15-20 Minutes), BT (Bluetooth Mode Active), and 3 more.

Error code HDMI also appears on 2 other Samsung TV & Audio models: HW-B650 3.0 Channel 330 Watt Soundbar with DTS Virtual:X and Bluetooth, HW-Q990C 11.1.4 Channel 546 Watt Soundbar with Dolby Atmos, DTS:X, and Wireless Subwoofer. The fix may vary by model, so check each model's specific page for tailored repair steps.