TCL TV 4 SERIES ROKU BLACK SCREEN SOUND WORKING General Troubleshooting
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
85%
CONF
|
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)
|
|
|
10%
CONF
|
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.
|
|
|
5%
CONF
|
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)
|
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.