TCL TV 4 SERIES ROKU BLACK SCREEN SOUND WORKING General Troubleshooting
| CONF | DIAGNOSIS | PART MATCH | ACTION |
|---|---|---|---|
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85%
CONF
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LED Backlight Strip Kit
The TCL 4-Series frequently suffers from premature LED burnout where one or more diodes in the series circuit fail, triggering a protection mode that disables the entire backlight. Replacing the complete set of strips restores illumination to the LCD panel. This is confirmed when sound and UI navigation pings are audible despite a dark display.
SKU: N/A (Model Dependent)
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CHECK PRICE |
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10%
CONF
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Power Supply Board
The LED driver circuit is integrated into the power supply board. If the board fails to provide the necessary constant current to the backlight array, the screen will remain black even if the LEDs are healthy. This is a secondary possibility if the LED strips test positive for continuity.
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CHECK PRICE |
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5%
CONF
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T-Con Board
The Timing Controller (T-Con) translates the main board signal for the LCD panel. While usually associated with distorted images or vertical lines, a total failure of the T-Con or its fuse can result in a 'glow' but no image, though it is less likely than backlight failure for this specific symptom.
SKU: N/A (Model Dependent)
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CHECK PRICE |
DIY Repair Guide
Watch exactly how to replace the LED Backlight Strip Kit.