SAMSUNG HW-Q900T Arc Handshake Failure
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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85%
CONF
|
Main Logic Board (PCB) Assembly
The Main PCB contains the HDMI controller IC and the EEPROM responsible for the ARC/eARC handshake protocol. A failure in this component prevents the soundbar from correctly negotiating the Extended Display Identification Data (EDID) and Consumer Electronics Control (CEC) signals with the television. Replacing the board restores the physical interface logic and provides a fresh firmware environment for the handshake state machine.
|
|
|
15%
CONF
|
Ultra High Speed HDMI 2.1 Cable
ARC and eARC handshakes are highly sensitive to cable impedance and shielding. Physical degradation or internal micro-fractures in standard cables can cause signal attenuation on the CEC or HEAC (HDMI Ethernet and Audio Return Channel) lines, leading to a synchronization timeout. A certified HDMI 2.1 cable ensures the bandwidth and pin-to-pin continuity required for the bi-directional eARC data stream.
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DIY Repair Guide
Watch exactly how to replace the Main Logic Board (PCB) Assembly.
// NOTICE:
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