How to fix horizontal Lines on Macbook Pro?

In the MacBook Pro series of computers, Apple has used two different types of screens that are light-emitting display and a liquid crystal display. Both the screens have their pros and cons, they both use different technologies and both may face any type of error problems regarding hardware or software.

The most common problem arising out with all the MacBook pro users nowadays is, a horizontal line is appearing on the screen which causes disturbance and also hinders its flawless working. Without having sufficient knowledge to fix it if you do so, this may cause multiple problems in your device including horizontal lines.

Fix Macbook pro horizontal lines on screen:

Are you tired of those annoying horizontal lines ruining your MacBook Pro’s display? Well, you’ve come to the right place. In this video, we’ll show you how to fix those pesky lines and get your screen back to its pristine condition.

Understanding the MacBook Pro Display

The MacBook Pro has an LCD or LED screen connected to the video card located inside the laptop’s chassis. The display works through a process where binary data is processed by the CPU and then translated by the video card into an image that appears on the screen. Faulty settings, damaged components, or improper connections between hardware and the display can cause errors, including horizontal lines on the MacBook Pro.

Temporary Fix: Adjust Screen Position

Sometimes, horizontal lines appear due to loose connections between the display and internal hardware. A quick way to test this is by adjusting the screen’s position:

• Close and open the MacBook Pro’s screen.
• Try changing the angle of the display until the horizontal lines disappear.

If this adjustment doesn’t resolve the issue, it’s likely a software or hardware problem that requires further troubleshooting.

Tips to Fix Horizontal Lines Appearing on Your MacBook Pro

Most of the MacBook Pro owners are reporting their complaints about the appearance of horizontal lines in their devices. This problem is likely to be a hardware issue. So, here are some tips to fix the issue: –

Step 1: Reset the System Management Controller (SMC)

Resetting the SMC can resolve issues related to power management and display errors.

• For models with a T2 chip:
  1. Turn off your MacBook Pro.
  2. Press and hold the Control (left), Option (left), Shift (right), and Power buttons simultaneously for 7-10 seconds.
  3. Release all keys and wait for 30 seconds, then turn on your MacBook.
• For models without a T2 chip:
  1. Turn off your MacBook Pro.
  2. Press and hold the Shift (left), Control (left), Option (left), and Power buttons for 10-12 seconds.
  3. Release the keys, wait for 30 seconds, and turn on your MacBook.

Step 2: Reset NVRAM

Resetting the NVRAM can help fix display settings-related issues.

1. Restart your MacBook.
2. Immediately press and hold Command + Option + P + R.
3. Release the keys after the startup sound plays twice or when the Apple logo appears and disappears twice (for T2 models).

Step 3: Run Apple Diagnostics

Apple Diagnostics can identify hardware issues causing horizontal lines.

1. Turn off your MacBook.
2. Turn it on and press and hold the D key until a diagnostic screen appears.
3. Follow the on-screen instructions to identify any errors.

Step 4: Boot in Safe Mode

Safe Mode can isolate software-related issues.

1. Restart your MacBook while holding the Shift key.
2. Log in to your MacBook and check if the horizontal lines persist.

Step 5: Update macOS and Graphics Drivers

Outdated macOS or graphics drivers can lead to display issues.

1. Go to the Apple Menu > System Preferences > Software Update.
2. Install any available updates and restart your MacBook.

Step 6: Attach an External Display

This step helps determine whether the issue is with the screen or the GPU.

1. Connect your MacBook Pro to an external monitor using an HDMI, Thunderbolt, or USB-C cable.
2. Observe if horizontal lines appear on the external screen.

• If lines appear on both screens: The GPU is likely faulty.
• If lines appear only on the MacBook Pro: The display panel may be damaged.

Step 7: Reset the Display Resolution

Improper resolution settings can cause display errors.

1. Go to System Preferences > Displays.
2. Select Scaled and choose a different resolution.

Step 8: Run Disk Utility to Repair Disk Errors

Corrupt files or disk errors can cause display glitches.

1. Restart your MacBook in Recovery Mode by holding Command + R during startup.
2. Select Disk Utility, choose your startup disk, and click First Aid.

Step 9: Inspect for Dust or Loose Connections

Dust accumulation or loose cables inside the MacBook can affect the display.

• Clean the vents and inspect internal connections.
• Ensure that the display cable is securely attached.
• Note: This step requires technical expertise. Consult a professional if needed.

Step 10: Replace Thermal Paste

Overheating can lead to GPU-related display issues. Replacing the thermal paste between the CPU/GPU and heatsink can improve cooling.

• Note: Only a certified technician should perform this step.

Step 11: Perform a Clean macOS Reinstall

If none of the above steps work, reinstalling macOS may help.

1. Backup your data using Time Machine.
2. Restart your MacBook in Recovery Mode (Command + R).
3. Select Reinstall macOS and follow the on-screen instructions.

When to Seek Professional Help

The Macbook Pro screen repair may cause you to experience a number of operational issues. This may cause your MacBook display to work inefficiently and occasionally cause glitches. To figure out what’s wrong, you’ll need to troubleshoot your MacBook. If you’ve tried all these steps and the problem persists, the issue is likely hardware-related. Contact our  service center for a professional diagnosis. Horizontal lines can result from a failing GPU or a damaged display panel, both of which require expert repair.

Please note that the guideline instructions provided may not always apply to the symptoms your computer is experiencing. Sometimes, symptoms or behavior can be the same, but the underlying reason or fault can be completely different.

The fastest way we can assist customers is by bringing computers to our workshop, where technicians have the tools to diagnose faults accurately. After checks, if parts are found to be faulty or damaged, we proceed to replace them with high-quality original parts.

No appointments are required; you can drop off your computer at our workshop during working hours.

If you have more queries about our laptop repair and upgrade services, please feel free to contact us at 020 7018 7490 or email us at contact@pcfixlondon.com