SONY TV BRAVIA XR X90K Black Screen Sound Working
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
85%
CONF
|
Main Board (A-Board)
The Main Board handles all HDMI 2.1 handshaking and video processing; failure in the SoC (System on Chip) or the LVDS/V-by-One output stage will result in audio passing through to the speakers while the panel receives no video data. Since the X90K uses a sophisticated protection circuit, a backlight failure would typically trigger a 4 or 6-count red blink code, whereas a silent black screen usually points to a logic failure on this board.
|
|
|
15%
CONF
|
Secondary Circuit / Wiring Check
Inspect wiring harness.
|
DIY Repair Guide
Watch exactly how to replace the Main Board (A-Board).
// 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.