Fix Vertical Lines on iPhone: Step-by-Step Guide

Vertical lines on an iPhone screen can appear suddenly and range from faint stripes to bold, colored bars that obscure the display. This guide walks you through the most common fixes, from simple software restarts to identifying hardware damage, so you can determine whether a DIY solution works or if you need professional service.

What You’ll Need

• Your iPhone
• A computer with the latest version of iTunes (Windows) or Finder (macOS)
• A USB cable compatible with your iPhone
• A soft, dry microfiber cloth
• Optional: a replacement screen if you plan a DIY repair (not recommended for most users)

Step-by-Step

1. Force restart your iPhone. This clears temporary software glitches that can cause display artifacts. The method depends on your model:
   • iPhone 8 or later: Press and quickly release the Volume Up button, then the Volume Down button, then press and hold the Side button until the Apple logo appears.
   • iPhone 7/7 Plus: Press and hold both the Side button and the Volume Down button until the Apple logo appears.
   • iPhone 6s or earlier: Press and hold both the Home button and the Side (or Top) button until the Apple logo appears.
2. Check for physical damage. Inspect the screen for cracks, chips, or signs of liquid exposure. Even a tiny impact can damage the display connector or the LCD itself, causing lines. If you see damage, proceed to the hardware section below.
3. Remove the screen protector and case. Sometimes a poorly fitted screen protector or a case pressing on the display can create pressure-induced lines. Remove both and see if the lines disappear.
4. Update iOS. Go to Settings > General > Software Update. If an update is available, install it. Apple regularly fixes display bugs in iOS updates.
5. Reset all settings. This doesn’t erase your data but resets system settings like display brightness, wallpaper, and accessibility options. Go to Settings > General  Transfer or Reset iPhone > Reset > Reset All Settings. You’ll need to re-enter Wi-Fi passwords afterward.
6. Restore your iPhone via computer. If the lines persist, connect your iPhone to a computer and put it in recovery mode, then restore it. This reinstalls iOS completely. Back up your iPhone first (via iCloud or computer). Steps:
   1. Connect your iPhone to your computer.
   2. Put your iPhone in recovery mode (use the same button combination as force restart, but keep holding until you see the recovery mode screen).
   3. In Finder (macOS Catalina or later) or iTunes (Windows or older macOS), you’ll see a prompt to Update or Restore. Choose Restore.
7. Test in Safe Mode (if jailbroken). If you have a jailbroken iPhone, a tweak can cause display issues. Restart your iPhone in Safe Mode (usually by holding the Volume Down button during boot) and see if lines disappear. If they do, uninstall recently added tweaks.
8. Hardware diagnosis. If none of the above works, the lines are almost certainly a hardware issue. The most common causes are:
   • Damaged display cable or connector
   • Faulty LCD panel
   • Logic board issues (less common)

   At this point, you should contact Apple Support or visit an Apple Store or authorized service provider for a diagnostic. If your iPhone is under warranty or AppleCare+, the repair may be free.

Common Mistakes

• Ignoring the force restart sequence. Many people hold the wrong buttons or release too early. Make sure you follow the exact sequence for your model.
• Skipping the restore step. A simple restart won’t fix a corrupted iOS system file. A full restore is more thorough.
• Attempting a DIY screen replacement without experience. This often causes more damage, especially if you break the Face ID sensor or other delicate components.
• Assuming it’s always hardware. While lines are often hardware, software glitches can mimic them. Always try software fixes first.

Tips

• Back up regularly. If you need to restore or replace your phone, you won’t lose data.
• Use a quality screen protector and case. They can prevent the impact that causes lines.
• Keep your iPhone away from extreme heat or cold. Temperature fluctuations can stress the display.
• If you have AppleCare+, use it. Screen repairs are often covered with a small service fee.

Troubleshooting

If the lines persist after a restore, or if they change when you press on the screen, it’s hardware. Here’s what to do:

• Lines change with pressure: This indicates a loose display cable. This can sometimes be fixed by a technician reseating the connector, but it’s not a DIY job for most users.
• Lines appear only at certain brightness levels: Could be a software issue, but often a failing display. Try the restore first, then seek service.
• Lines appear after water exposure: Even if your iPhone is water-resistant, water can damage the display. Turn off the iPhone immediately and do not charge it. Take it to a professional.
• If the screen is completely unresponsive: This is a more severe hardware failure. You may need a screen replacement. Contact Apple Support.

Frequently Asked Questions

Will a factory reset fix vertical lines on my iPhone?

Sometimes, if the lines are caused by a software bug. A restore (which reinstalls iOS) is more thorough than a simple reset. If the lines are hardware, a reset won’t help.

How much does it cost to fix vertical lines on an iPhone screen?

Costs vary by model and warranty status. Without AppleCare+, a screen replacement can range from $129 to $329 depending on the iPhone model. With AppleCare+, it’s typically $29. Check Apple’s support site for current pricing.

Can vertical lines on iPhone be fixed without replacing the screen?

Only if the cause is software or a loose cable. A loose cable can be reseated by a technician, but that requires opening the phone. If the LCD itself is damaged, the screen must be replaced.

Why do vertical lines appear after an iOS update?

It could be a bug in the update. Apple usually fixes these in subsequent updates. If the lines persist after updating to the latest version, it’s more likely a hardware issue that was coincidental.

Are vertical lines covered under Apple’s warranty?

If the lines are due to a manufacturing defect and your iPhone is within the one-year limited warranty or AppleCare+, yes. If it’s from accidental damage, you’ll pay a service fee.

Can I prevent vertical lines from happening again?

Use a protective case and screen protector, avoid dropping your phone, and keep it away from moisture and extreme temperatures. There’s no guaranteed prevention, but these steps reduce risk.

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