TCL TV 4 SERIES ROKU LINES ON SCREEN General Troubleshooting
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
85%
CONF
|
T-Con Board
The T-Con board translates the main board's video signal into instructions for the LCD panel. A malfunction in its logic IC or gamma voltage generation frequently manifests as vertical or horizontal lines. Replacing this board is the most cost-effective first-line repair for signal-based display artifacts.
|
|
|
10%
CONF
|
LVDS Ribbon Cables
Oxidation or poor seating of the ribbon cables between the T-Con and the panel can lead to data loss for specific columns or rows of pixels. Cleaning the contacts with isopropyl alcohol or replacing the cables can restore full signal continuity.
|
|
|
5%
CONF
|
LCD Panel (Open Cell Assembly)
If lines remain after board replacement, the internal gate drivers or Chip-on-Film (COF) bonds inside the glass have failed. This is considered a non-serviceable defect for field engineers as the part cost usually exceeds the value of the 4-Series TV.
|
DIY Repair Guide
Watch exactly how to replace the T-Con Board.
// 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.