LG TV & Audio SP7Y 5.1 Channel 440W Soundbar with Meridian & DTS Virtual:X AUTO POWER OFF Error Fix: Soundbar Turns Off Unexpectedly

Error code AUTO POWER OFF on the LG TV & Audio SP7Y 5.1 Channel 440W Soundbar with Meridian & DTS Virtual:X means: Soundbar Turns Off Unexpectedly. Soundbar turns off during use. Auto Power Off feature powers down after no audio signal (~15 minutes). To disable: press and hold Mute button 3 seconds (or use LG Sound Bar app → Settings → Auto Power Off → Off). If turns off with continuous audio, thermal protection may be engaging or power supply is unstable.

The most successful fix is "Check and Repair Power Supply or Thermal Protection Circuit" (medium difficulty, ~60 minutes). Estimated DIY cost: $10-$20. 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 ("Check and Repair Power Supply or Thermal Protection Circuit") is rated medium difficulty and takes about 60 minutes. Tools needed: T10 Torx screwdriver, Multimeter, Soldering iron, Solder sucker.

DIY cost: $10-$20. Professional repair typically costs $120-$200. Many homeowners save money by trying the top-ranked community fix first.

The LG TV & Audio SP7Y 5.1 Channel 440W Soundbar with Meridian & DTS Virtual:X has 8 other known error codes, including: AMP BOARD FAIL (Amplifier Board Failure), ARC BOARD FAIL (HDMI ARC Board Failure), ARC CONNECTION FAIL (HDMI ARC Connection Not Established), BLUETOOTH PAIRING FAIL (Bluetooth Pairing Failed), DISTORTED AUDIO (Sound Distortion at Volume), and 3 more.

Error code AUTO POWER OFF also appears on 2 other LG TV & Audio models: S95QR 9.1.5 Channel 810W Soundbar with Meridian & Dolby Atmos, SP11RA 7.1.4 Channel 770W Soundbar with Meridian & Dolby Atmos. The fix may vary by model, so check each model's specific page for tailored repair steps.