SONY TV BRAVIA BLINKING RED LIGHT 4 TIMES General Troubleshooting
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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86%
CONF
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LED Backlight Strip Kit
The 4-blink error code specifically monitors the LED circuit. Over time, individual LEDs within the array develop high resistance or open circuits due to heat, causing the protection circuit to trigger a shutdown. Replacing the full array of strips ensures the current load is balanced across the entire panel.
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|
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9%
CONF
|
LED Driver (LD) Board
This board is responsible for stepping up voltage and regulating current for the backlight array. If a MOSFET or capacitor on this board fails, it will report an 'LD_ERR' to the main processor, resulting in the 4-blink sequence even if the LEDs themselves are functional.
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|
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5%
CONF
|
Power Supply Unit (G-Board)
The Power Supply provides the raw DC voltage to the LED Driver. If the backlight power rail is sagging or contains excessive noise/ripple due to failing filter capacitors, the driver may interpret this as a load error and trigger the 4-blink diagnostic code.
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DIY Repair Guide
Watch exactly how to replace the LED Backlight Strip Kit.
// 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.