Smartphone "Green Line" on Screen
4.5
A thin, bright green vertical line appears on the screen and stays there permanently.
Symptoms
- Vertical green line
- Flickering
- Permanent mark
Possible Causes
- Hardware defect (OLED)
- Physical impact
- Water damage
Step-by-Step Fix
1
Check for Physical Damage
Look for tiny cracks near the top or bottom of the line.
2
Update Software
Rarely, a software glitch causes this, but it is almost always hardware.
3
Check Warranty/Recall
Some models (like Samsung S20/S21) had known defects and might be repaired for free.
When to See a Technician
The green line is a sign of a failed connection in the OLED panel's flexible circuit.
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