Samsung TV & Audio HW-B650 3.0 Channel 330 Watt Soundbar with DTS Virtual:X and Bluetooth AUTO STANDBY Error Fix: Soundbar Auto Powers Off After 15-20 Minutes

Error code AUTO STANDBY on the Samsung TV & Audio HW-B650 3.0 Channel 330 Watt Soundbar with DTS Virtual:X and Bluetooth means: Soundbar Auto Powers Off After 15-20 Minutes. Soundbar automatically turns off after 15-20 minutes of no audio signal. This is normal designed behavior — Samsung soundbars have auto power-off (auto standby) to save energy. The timer is typically 15-20 minutes with no audio input detected. Disable via: SmartThings app → Soundbar settings → Auto Power Off → Off. On some models, press and hold the power button for 3 seconds to toggle auto standby. If the soundbar turns off DURING active playback, the audio signal may be too quiet for the soundbar to detect, or the power supply has an intermittent fault.

The most successful fix is "Test and Replace Power Supply Board" (medium difficulty, ~45 minutes). Estimated DIY cost: $10-$20. 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 ("Test and Replace Power Supply Board") is rated medium difficulty and takes about 45 minutes. Tools needed: T10 Torx screwdriver, Multimeter, Plastic pry tool.

DIY cost: $10-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The Samsung TV & Audio HW-B650 3.0 Channel 330 Watt Soundbar with DTS Virtual:X 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), B650 ARC ONLY (Standard ARC Only — No eARC Support), B650 BASS MANAGE (Bass Hump / Gap at Crossover Between Soundbar and Subwoofer), and 3 more.

Error code AUTO STANDBY also appears on 2 other Samsung TV & Audio models: HW-Q990C 11.1.4 Channel 546 Watt Soundbar with Dolby Atmos, DTS:X, and Wireless Subwoofer, HW-S800B Ultra Slim 3.0 Channel 360 Watt Soundbar with Dolby Atmos and Bluetooth. The fix may vary by model, so check each model's specific page for tailored repair steps.