SAMSUNG UN55NU6900 DARK SCREEN General Troubleshooting
| CONF | DIAGNOSIS | ACTION |
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85%
CONF
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LED Backlight Strip Set
The most common failure in the NU6900 series is the degradation of the LED diodes within the backlight strips. When one or more LEDs in the series circuit fail or pull too much current, the power supply's protection circuit may shut down the entire backlight rail to prevent further damage. Replacing the complete set of strips restores the light source required for the LCD panel to display an image.
SKU: BN96-45952A / BN96-45962A
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10%
CONF
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Power Supply Board (L55V6_RDY)
The Power Supply Board houses the LED driver circuitry responsible for stepping up voltage to power the backlights. If the transformer or capacitors within this specific circuit fail, the backlights will not receive power even if the LEDs themselves are healthy. This is the second most likely cause if the backlight strips are verified as operational.
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5%
CONF
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Main Board
The Main Board provides the 'BL_ON' (Backlight On) signal to the Power Supply. If the logic processor or the control circuit for the panel's timing (T-CON integrated on this model) fails, the TV may remain in a 'black screen' state where the panel does not initialize even if the backlights are technically capable of firing.
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DIY Repair Guide
Watch exactly how to replace the LED Backlight Strip Set.
// 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.