SAMSUNG Q80T QLED SERIES (QNQ80T) No Picture Has Sound
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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86%
CONF
|
LED Backlight Strip Array
The Q80T uses a Full Array Local Dimming (FALD) system where LEDs are wired in series-parallel strings. If a significant number of LEDs fail or short due to thermal stress, the power supply's protection logic may disable the entire backlight rail to prevent further damage, resulting in a black screen while the system logic and audio remain active.
|
|
|
9%
CONF
|
Power Supply Board (LIPS Board)
This board contains the LED driver circuitry responsible for boosting voltage to the backlight array. A failure of the transformer, filter capacitors, or driver ICs on this board can result in the loss of backlight voltage ('no picture') while still providing the 13V standby/run rails required for the Main Board and speakers to function.
SKU: BN44-01056A
|
|
|
5%
CONF
|
Main Logic Board
The Main Board handles the LVDS/V-by-One video signal processing. If the video processor or the T-CON sub-section (often integrated in this model) fails, it will stop sending the image data to the panel. While less common than backlight failure for this specific symptom, a digital signal processing fault can leave the audio processing block operational while the video output is null.
SKU: BN94-15336B
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DIY Repair Guide
Watch exactly how to replace the LED Backlight Strip Array.
// 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.