Left Side of iPhone Screen Not Working? 8 Ways to Fix It [2026]

When the left side of your iPhone screen is not working, the first question is whether the touch layer is failing physically or iOS is not responding correctly. A cracked screen, recent drop, swollen battery, or water exposure points toward repair service.

This guide walks through the most useful checks for left side of iPhone screen not working, from simple screen cleaning and force restart to iOS repair, recovery restore, and factory reset.

Watch this video guide for quick fixes

Why the Left Side of iPhone Screen Is Not Working

A partially unresponsive screen usually comes from one of three places: the display hardware, something blocking touch input, or iOS failing to handle touch events correctly. The fastest way to narrow it down is to test whether the same side fails everywhere.

• Possible hardware damage: a fall, pressure mark, water exposure, green/pink line, lifted screen, or dead vertical strip can mean the digitizer or display cable needs repair.
• Screen protector or case interference: a thick, cracked, misaligned, or dusty protector can make one edge of the iPhone screen stop responding.
• Temporary iOS glitch: the left side may stop responding after an update, app freeze, failed restore, or system lag.
• Settings or storage pressure: low storage, outdated apps, accessibility settings, or a corrupted setting can make touch feel delayed or uneven.
• App-specific issue: if the left side only fails in one app, update or reinstall that app before treating the whole iPhone as broken.

1. Advanced Solutions to Fix Left Side of iPhone Screen Not Working

Use the advanced methods when basic touch checks do not help, the issue started after an iOS update or restore, or the iPhone is too unresponsive to use normally. If the display is physically damaged, skip software repair and contact Apple or a trusted repair provider.

Solution 1. Repair iOS Touch Issues with Fixppo

If the iPhone left side touch not working problem began after installing the new iOS, restoring from a backup, or restarting from a frozen app, the touch layer may still be fine while iOS is stuck in a bad state.

In that case, iMyFone Fixppo is useful because it fixes all kinds of iOS problems, including the top of iPhone screen not working.

Fixppo is designed for common iPhone system problems such as black screen, Apple logo, recovery mode, failed update, and touch-related software glitches. Standard Mode is the better first option because it focuses on system repair without immediately choosing an erase-based restore.

If the left side is dead because the display was cracked or the digitizer is damaged, software repair will not replace a screen repair.

• Repair iOS issues that can make part of the iPhone screen stop responding after update or restore.
• Use a guided firmware download and repair process instead of manually searching for IPSW files.
• Use the built-in backup-related workflow before deeper repair options when the iPhone can still be detected.
• Work with recent iPhone models and recent iOS versions, including iOS 27 scenarios, on supported devices.

Follow these steps to repair the iOS side of the problem with Fixppo Standard Mode.

Step 1: Launch Fixppo, choose Standard Mode, connect your iPhone to the computer, and click Next. If the left side of the screen is not responding, use the computer-side instructions rather than trying to tap around the iPhone repeatedly.

Step 2: If the iPhone is not detected normally, follow the on-screen guide to put it into Recovery Mode or DFU Mode. This is helpful when touch input is too unreliable to operate the iPhone from Settings.

Step 3: Download the firmware package shown by Fixppo. Make sure the device model and firmware information match your iPhone before starting the repair.

Step 4: Start the standard repair and wait until the process finishes. Do not disconnect the cable during firmware repair. After the iPhone restarts, test the left edge in Messages, Settings, Safari, and the keyboard.

If the same left-side area is still dead after iOS repair, the result points more strongly toward screen hardware, especially if the problem appears before you unlock the iPhone.

Solution 2. Restore iPhone with Finder, Apple Devices, or iTunes

If the iPhone touch screen is partially not working and the system still seems unstable after a repair attempt, restoring through a computer can reinstall iOS. On newer Macs, use Finder. On Windows, use the Apple Devices app or iTunes, depending on your setup.

Step 1: Connect the iPhone to your computer and open Finder, Apple Devices, or iTunes. If the iPhone is not recognized, put it into Recovery Mode.

Step 2: For iPhone 8 or later, quickly press Volume Up, quickly press Volume Down, then hold the Side button until the recovery screen appears. For older models, use the model-specific recovery button combination.

Step 3: Choose Update first if it is offered. Update reinstalls iOS and is usually the better first attempt when you are trying to keep current data.

Step 4: Choose Restore only when Update fails or the iPhone cannot boot correctly. Restore erases the iPhone and installs iOS again.

Solution 3. Erase All Content and Settings

Erase All Content and Settings can fix a deep settings or software conflict, but it removes current data from the iPhone. Use it only when the screen still works well enough to navigate Settings, you have a backup, and you have ruled out a cracked display or digitizer issue.

Step 1: Open Settings and go to General.

Step 2: Tap Transfer or Reset iPhone, then choose Erase All Content and Settings.

Step 3: Enter the passcode and Apple Account details if asked, then confirm the erase.

2. Basic Solutions for Partial iPhone Touch Problems

Try these fixes first if the iPhone has not been dropped and the touch problem is intermittent. They are also useful after an iOS 27 update when the screen responds slowly, only one edge misses taps, or the issue appears mainly inside apps.

Solution 1. Reset All Settings

Reset All Settings keeps your personal data but resets Wi-Fi, keyboard, display, privacy, accessibility, and other system settings. It can help when a setting conflict makes part of the screen feel unresponsive.

Step 1: Go to Settings > General > Transfer or Reset iPhone.

Step 2: Tap Reset, then choose Reset All Settings. After the iPhone restarts, test the left side again.

Solution 2. Force Restart Your iPhone

A force restart clears a frozen touch process without erasing the iPhone. It is the quickest fix when the left side stops responding suddenly after an app crash, keyboard freeze, update restart, or charging overnight.

iPhone 8 and later: Press and release Volume Up, press and release Volume Down, then hold the Side button until the Apple logo appears.

iPhone 7 and 7 Plus: Hold the Side button and Volume Down button until the Apple logo appears.

iPhone 6s and earlier: Hold the Home button and Side or Top button until the Apple logo appears.

Solution 3. Update iOS

If the left side of the iPhone screen became unreliable after installing an early iOS 27 build or after a recent update, check for the next iOS update. Apple often fixes touch response, display rendering, and app-compatibility problems through later updates.

Step 1: Open Settings > General > Software Update.

Step 2: Install the available update if your iPhone has enough battery and storage. Keep the iPhone connected to Wi-Fi and power during the update.

Solution 4. Remove Screen Protector

A screen protector can cause edge-touch problems when it is cracked, lifted, too thick, or slightly misaligned. Remove it, clean the screen, restart the iPhone, and test typing, Control Center, and app icons along the left side.

Solution 5. Clean the iPhone Screen

Moisture, oil, dust, or pressure from a case can make one edge of the screen miss taps. Power off the iPhone if possible, remove the case, and wipe the display with a soft, dry, lint-free cloth. Do not spray liquid directly on the screen.

FAQs about Left Side of iPhone Screen Not Working

Why is only one side of my iPhone screen not responding?

One-sided touch failure often means the digitizer is not reading that area correctly. It can be caused by screen damage, a bad protector, moisture, system lag, or an iOS update problem. If the exact same side fails everywhere, hardware becomes more likely.

Can an iOS 27 update cause part of the screen to stop working?

An update can trigger temporary touch lag, app freezes, or display response problems, especially during early post-update indexing. However, iOS cannot fix cracked glass, display cable damage, or a damaged digitizer. Test both software fixes and physical signs before deciding.

How do I unlock my iPhone if the left side of the screen does not work?

Try rotating the iPhone if the app or screen supports it, connect a keyboard if available, or use Siri and accessibility controls if they were already enabled. If you cannot enter the passcode and the screen remains partially dead after a restart, use a computer-based repair or service route.

Conclusion

For a left-side iPhone screen that is not working, start with the checks that cost nothing: remove the protector, clean the screen, force restart, reset settings, and update iOS. If the problem began after iOS 27 update or restore and the screen is not physically damaged, try Fixppo before erase-based restore. If one vertical area never responds, even before unlocking, the iPhone likely needs hardware inspection.