ARC BOARD FAIL
LG TV & Audio · SP7Y 5.1 Channel 440W Soundbar with Meridian & DTS Virtual:X
Some soundbars have separate HDMI processing board. If failed, ARC/eARC audio won't work but other inputs (optical, Bluetooth, aux) continue functioning. If audio works on Bluetooth and optical but not HDMI, ARC board has failed. Check HDMI cable and TV ARC port first.
Error ARC BOARD FAIL on the LG TV & Audio SP7Y 5.1 Channel 440W Soundbar with Meridian & DTS Virtual:X means: HDMI ARC Board Failure. The top-ranked community fix is “Replace the HDMI ARC Processing Board” (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 Connection Not Established
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 SP7Y 5.1 Channel 440W Soundbar with Meridian & DTS Virtual:X has 8 other known error codes:
Error code ARC BOARD FAIL also appears on 2 other LG TV & Audio models:
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