Samsung Phone Lines on Screen - Samsung Troubleshooting

Step 1 | Software Bug or Conflict

Image issues may be caused by software problems, not hardware.

Update all apps and the phone's OS separately.
If the issue is limited to one app, close it and try reproducing the problem.

Tip: The System Update location varies by Android version. Find it in settings or do a search.

If issues persist across multiple apps, update your phone's OS.

Last resort: Reset the phone after backing up data to rule out software causes entirely.

Step 2 | Screen Disconnect

Reseat all display cables to ensure a secure connection.

Check the board-to-display connection, especially after a drop or repair.
If missing signals are detected, open your phone and reseat any display-related connectors.
Use compressed air or isopropyl alcohol and a cotton swab to clean out dust or debris from the connector.

Step 3 | Faulty Display

Minor display damage may be imperceptible without visible signs.

Inspect the display for hairline cracks by changing your viewing angle.
OLED displays with green or purple lines may indicate electrical issues within the screen.
On Samsung OLED displays, look for broken sub-pixel columns in specific patterns.
Inspect the back of the display and its components for damage to chips that can impact image quality.

If none of these solutions improve image quality, replace the display as a better option than attempting repair with a laser machine due to high costs and accessibility issues.

Step 4 | Damaged Cable

Damage to internal display lines may cause missing or distorted data.

Inspect cables for tears or other damage, especially in corners or folds.
Use the iFixit Display Replacement Guide for your Samsung phone to identify related screen function cables.

If you've recently replaced the display, re-check your work for any potential issues.

Replace the display if internal damage is found.

Step 5 | Motherboard Malfunction

Assume board failure if other troubleshooting steps have not resolved the issue.

Inspect for obvious signs of damage: burned or cracked components, liquid residue, corrosion, or bend.
If you find liquid damage, refer to the iPhone Liquid Damage Guide.

Replacing the motherboard is often the most practical solution for board-level failures.

Consider repairing small components with microsoldering (expertise required).
For assistance, check local repair shops or online resources like Jessa's YouTube channel.

Step 6 | Additional Resources

Locate the Diamond Pixel on the screen.

Position the microscope over the Diamond Pixel.
Adjust the focus to bring the pixel into clear view.