Laptop Screen "Lines" (Horizontal or Vertical)
4.5
Permanent colored lines appear across the screen, regardless of what is being displayed.
Symptoms
- Colored lines
- Flickering
- Distorted image
Possible Causes
- Damaged LCD panel
- Loose display cable
- Failing GPU
Step-by-Step Fix
1
Test with External Monitor
If the lines don't appear on the external screen, your laptop screen is broken.
2
Apply Gentle Pressure
Lightly press the bezel near the lines to see if they change; this indicates a loose connection.
3
Update Graphics Drivers
Rule out software glitches before assuming hardware failure.
When to See a Technician
Vertical lines are usually a sign of a failed "gate driver" on the LCD panel itself.
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