ARC CONNECTION FAIL
LG TV & Audio · SP11RA 7.1.4 Channel 770W Soundbar with Meridian & Dolby Atmos
Soundbar connected via HDMI ARC but no audio from TV. Ensure HDMI cable on ARC/eARC port (typically HDMI 2 on LG TVs). Enable CEC/SimpLink on TV. Set TV Sound Out to HDMI ARC. Try different HDMI cable. Power cycle: turn off TV → soundbar → unplug both 30 seconds → plug in soundbar first → TV → turn on soundbar → TV. For eARC, use Ultra High Speed HDMI cable.
Error ARC CONNECTION FAIL on the LG TV & Audio SP11RA 7.1.4 Channel 770W Soundbar with Meridian & Dolby Atmos means: HDMI ARC Connection Not Established. The top-ranked community fix is “Test and Replace HDMI ARC Board in Soundbar” (hard difficulty, ~60 min, DIY cost: $0). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · soundbar
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many soundbar repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $150-$250.
Amplifier Board Failure
HDMI ARC Board Failure
Soundbar Turns Off Unexpectedly
Bluetooth Pairing Failed
Sound Distortion at Volume
Unsupported Audio Format
All LED Indicators Blinking — System Error
Steady Red LED — Protection Mode
The LG TV & Audio SP11RA 7.1.4 Channel 770W Soundbar with Meridian & Dolby Atmos has 8 other known error codes:
Error code ARC CONNECTION FAIL also appears on 2 other LG TV & Audio models:
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