Samsung “green line” on screen after update – explanation & steps for UK users

Samsung “Green Line” on Screen After Update – Explanation & Steps for UK Users

What Causes the Green Line on Samsung Screens?

After some software updates, certain Samsung devices may display a vertical green line on the screen. This issue can be caused by a combination of software glitches, temporary screen driver misalignment, or less commonly, hardware-related display defects. From experience, it’s often triggered immediately after a system update, but can appear days later.

How to Check If It’s Software or Hardware

1. Restart your phone: A simple reboot often resolves minor software-induced display glitches.
2. Boot into Safe Mode: Hold the Power button → tap and hold “Power Off” → select “Safe Mode.” If the green line disappears, it may be caused by a third-party app.
3. Check Samsung Diagnostics: Dial *#0*# on the keypad → select “Red/Green/Blue” tests to see if the line persists. A persistent line indicates potential hardware involvement.

Steps to Fix the Green Line

1. Update your software: Sometimes, Samsung releases quick patches to fix display glitches. Go to Settings → Software Update → Download and Install.
2. Clear cache partition: Turn off the device → press and hold Volume Up + Power + Bixby buttons → release at Samsung logo → select “Wipe cache partition.” This often resolves post-update display issues.
3. Reset settings: Settings → General Management → Reset → Reset Settings. No data is lost, only system settings revert.
4. Factory reset (if necessary): Back up data → Settings → General Management → Reset → Factory Data Reset. Usually a last resort.
5. Contact Samsung UK: If the line remains after all software fixes, it may be a hardware problem. Use authorised service centres to avoid voiding warranty. Find locations at Samsung UK Service Centres.

Preventive Tips for UK Users

• Always back up your data before major updates.
• Use Wi-Fi for downloads to avoid interruptions.
• Check the Display & Customization hub for tips on managing screen settings and updates.
• Avoid forcing updates from unofficial sources, which can introduce glitches.

Common Mistakes to Avoid

• Assuming the green line is purely cosmetic — persistent lines may indicate hardware damage.
• Attempting DIY repairs on the screen — could void warranty and worsen the issue.
• Ignoring small glitches that could worsen with subsequent updates.

Conclusion

The green line issue after Samsung updates is usually software-related but can occasionally be hardware-based. UK users should start with software troubleshooting steps, and if unsuccessful, consult authorised Samsung centres. Following proper update and backup practices reduces the likelihood of encountering such glitches.