SONOS ARC Hdmi Arc No Sound
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
91%
CONF
|
Ultra High Speed HDMI 2.1 Cable
The eARC protocol requires high-frequency data transmission across specific pins; a degraded or low-bandwidth cable fails to maintain the HDCP handshake and the bidirectional metadata required for Atmos/uncompressed audio. Replacing the cable ensures that the physical layer meets the 48Gbps requirement for stable eARC communication.
|
VIEW ON AMAZON
#CommissionsEarned
|
|
7%
CONF
|
HDMI CEC-Less Adapter
This adapter is used on non-audio peripherals (e.g., set-top boxes) connected to the same TV. It physically disconnects Pin 13 (CEC), preventing those devices from 'polluting' the shared CEC bus, which often causes the TV to lose the address of the Sonos Arc and default back to internal speakers.
|
VIEW ON AMAZON
#CommissionsEarned
|
|
2%
CONF
|
Main Digital Logic Board
If cable replacement and CEC isolation fail, the internal HDMI Controller IC or the EEPROM storing the EDID (Extended Display Identification Data) has likely suffered an ESD event or thermal fatigue, preventing the hardware from acknowledging the TV's handshake requests.
|
VIEW ON AMAZON
#CommissionsEarned
|
DIY Repair Guide
Watch exactly how to replace the 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.