SONY TV BRAVIA XR X90K Black Screen Sound Working
| CONF | DIAGNOSIS | PART MATCH | ACTION |
|---|---|---|---|
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85%
CONF
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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.
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|
CHECK PRICE |
|
15%
CONF
|
Secondary Circuit / Wiring Check
Inspect wiring harness.
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CHECK PRICE |
DIY Repair Guide
Watch exactly how to replace the Main Board (A-Board).