BOSE SMART SOUNDBAR 900 No Sound Hdmi Earc
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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92%
CONF
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Certified Ultra High Speed HDMI 2.1 Cable
The eARC protocol requires a dedicated high-speed data path via the HDMI Ethernet Channel (HEAC) pins which standard cables often fail to sustain. Signal crosstalk or inadequate shielding in lower-tier cables prevents the HDMI-CEC handshake from completing, resulting in the TV failing to recognize the soundbar as an active audio sink. A certified 48Gbps cable ensures the physical layer supports the high-frequency metadata exchange required for uncompressed audio return.
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VIEW ON AMAZON
#CommissionsEarned
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8%
CONF
|
Main Digital I/O Logic Board
If the physical interconnect is verified, the failure likely resides in the HDMI Transceiver IC located on the main logic board. This component handles the Consumer Electronics Control (CEC) bus logic; a firmware hang or hardware latch-up within this silicon prevents the soundbar from sending the 'ready' signal to the TV's processor. Replacing the board restores the integrated circuit's ability to process the eARC discovery and control protocol.
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VIEW ON AMAZON
#CommissionsEarned
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DIY Repair Guide
Watch exactly how to replace the Certified Ultra High Speed HDMI 2.1 Cable.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.