How to Fix Black Lines on MacBook Screen [5 Methods]

Did you notice black lines on your MacBook screen? Seeing horizontal black lines on your MacBook screen can be unsettling, especially if your MacBook hasn't been dropped, damaged, or exposed to water.

Unfortunately, some Mac users also experience similar screen issues. In this guide, we'll delve into the reasons behind these anomalies and how to address the problem of black lines appearing on your MacBook screen.

You might wake up one day to find these lines on your screen, which is why it's important to address the issue early on. While it might look alarming, this doesn't necessarily mean that there's a major problem at hand. In this article, we'll explore common causes and solutions to help you fix the issue.

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The black lines on your MacBook screen could be a complex hardware issue that requires professional attention, or it could be a simple software problem that you can fix on your own.

Before diving into the solution, it might be crucial to understand the reasons behind it. If you're curious about what could be happening, let me acquaint you with some common causes of black lines appearing on a MacBook screen.

Why do black lines appear on a MacBook screen?

Black lines on a MacBook screen are typically indicative of a major issue with either the hardware or software.

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It could be a hardware fault in the line itself, which includes:

• Overheating: This can result from various reasons, such as hot weather, running resource-intensive tasks on your MacBook, or having multiple apps running in the background, causing your MacBook's CPU to work excessively.
• Warning: Hardware issue: For instance, there might be an issue with the display itself. A damaged cable connecting the screen to the graphics chipset could be the culprit.
• Burn-in: This typically occurs when the same image is displayed on an LCD screen for extended periods. However, it doesn't commonly lead to horizontal or vertical lines appearing on a MacBook screen.
• Error: Display connection issue: Loose connections or unstable data transmission through the interface can also result in abnormal display behavior.

Software issues can cause this problem, including software conflicts, power management issues, outdated graphics drivers, and more. Worse, these reasons can lead to a MacBook screen going black and unresponsive or continuing to run.

If you're dealing with a MacBook screen that turns black but the computer is still running, don't worry! Read on to fix this issue.

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How to Fix Black Lines on MacBook Screen [5 Methods]

Before attempting more complex solutions, start with basic troubleshooting steps, like restarting your Mac. Also, if you're uncomfortable fiddling with your MacBook's hardware, it's recommended to seek professional help from a qualified technician.

To avoid the inconvenience of losing crucial data, it is recommended that you back up important files using professional Mac Data Recovery Software before fixing the Mac line on screen issue.

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Backup Your Mac and Never Lose Data

Back up and restore your MacBook/iMac without using Time Machine, iCloud, or an external hard drive.

Fix 1: Restart your Mac

A restart can fix many unexpected issues. To restart your Mac, be sure to follow these steps:

Step 1. Click on the Apple icon in the top-left corner.

Step 2: Choose Restart to restart your Mac.

If the "Restart" button is unresponsive or your Mac is frozen, you may need to force restart your Mac instead.

Solution 2: Lower your MacBook's temperature

If the room is warm, or you notice that your Mac's fans are running at full speed, it's best to shut down and let it cool off before restarting.

Macs function best at temperatures between 100°F (40°C) and 192°F (89°C). Increased CPU usage from things like the Mac's WindowServer can also cause temperature issues, so it's important to keep an eye on this as well.

If it's higher than that, you might experience performance issues or display problems. You can follow this article to optimize your Mac's performance.

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Solution 3: Reset the MacBook's System Management Controller

Resetting the SMC can also help with black lines appearing on your Mac's screen. If you have a MacBook with a T2 chip, follow these steps to reset the SMC on a MacBook Pro or Air:

Step one: Turn off your MacBook.

Step 2: Hold down the left “Option (or Alt on Mac) + Control + Shift” keys and the power button at the same time.

Please press and hold the left Option key (on a Mac, this is the Alt key) + Control key + Shift key.

Step 3: Hold all four buttons for about five seconds, then wait 30 seconds before letting go.

Step Four: Power up your MacBook.

If your MacBook doesn't have a T2 chip, you can reset the SMC by following these steps:

Step one: Turn off your MacBook.

Step 2: While holding down the left Shift, Control, and Option keys, press and hold the Power button.

Step 3: Hold down all four keys for about five seconds.

Step 4: Release the keys, wait 10 seconds, and then restart your MacBook.

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Solution 4: Reset the NVRAM on your Mac

Non-Volatile Random-Access Memory (NVRAM) retains settings even after you restart or turn off your Mac. If you're having issues like a MacBook screen with black lines or flickering, resetting NVRAM might help.

It also contains key settings for starting up your Mac, such as selecting the startup disk for your Mac, adjusting speaker volume, and configuring display resolution.

Resetting the NVRAM on a Mac:

First, click the Apple logo and select “Shut Down.”

Step 2: Restart your Mac, and immediately press and hold “Option + Command + P + R.”

Press and hold the Option + Command + P + R keys.

Step 3: Release the keys when you see the Apple logo appear twice or hear the startup sound a second time.

Fix 5: Use an External Display

To determine whether the lines on your MacBook screen are an issue with the display or the computer itself, you can try using another screen, such as through Apple's Universal Control.

If you see the lines on an external display, switch to a different display. If the lines appear on your notebook computer's built-in display, connect an external display to your Mac.

Finally, if you have problems with any display, focus on troubleshooting your Mac's software and hardware.

Bonus tip: How to avoid losing data on a problematic MacBook

Backing up important files, videos, or documents is essential to prevent data loss. Issues like black lines on MacBook screen, which can be caused by hardware problems, might wipe out your data permanently, so you need to create a backup before tackling such issues. You can use Time Machine to back up your Mac or tools like Data Recovery Wizard for Mac Pro.

It is a powerful data recovery software that can help you recover deleted files from Mac without Time Machine backup. With Mac recovery software, you can back up important files and recover permanently deleted files on Mac anytime!

Data Recovery Wizard helps you retrieve deleted files, even if they have been permanently erased or completely removed from the Recycle Bin or Trash. If you've lost files without a backup, you'll need data recovery software. So, let's quickly back up your files:

Step 1: Under “Disk Clone,” click “Create Backup” and then “Next.” This will create an image of your hard drive, in case anything goes wrong.

Step 2. Select the internal volume you want to back up, then click "Create Backup." If you want to create a backup and restore data from an external hard drive, USB flash drive, or SD card, connect the storage device to your Mac before proceeding.

Select a hard drive to back up

Step 3: Choose a location to save the backup file, rename it if you wish, then click “Save.” It is not recommended that you save the backup file on the same storage device from which you intend to recover data.

Select the location to save the disk backup and click “Save”.

The bottom line?

Encountering a black line error on your MacBook screen can be immensely frustrating, given that we generally expect Macs to be more reliable and user-friendly than other devices. However, in such situations, data recovery software like Disk Drill can be immensely helpful.

Protect your critical data and files with a data recovery tool like Data Recovery Wizard for Mac Pro. With its quick scan, extensive data recovery capabilities, file preview feature, and proven reliability, this tool is an essential ally in the battle against data loss.

Frequently Asked Questions About Black Lines on a MacBook Screen

When faced with a MacBook screen with black lines error, people often ask the following questions:

< strong > 1. Why is my Mac showing a black screen with a circle and a line through it?

A circle with a slash through it is the disabled symbol, indicating a problem. This means that there's a macOS on your startup disk, but your Mac can't use it. Try these steps to resolve the issue:

Step 1: Hold down your Mac's power button for about 10 seconds, until it turns off.

Step 2. Press the power button to restart your Mac, then quickly press and hold "Command + R" keys together. Keep holding both keys until you see the Mac Recovery Mode screen.

Step 3: In the macOS Recovery Utilities menu, choose Disk Utility, and then select your hard drive. Choose Repair Startup Disk.

2. Why am I seeing black horizontal lines on my Mac screen?

Black lines on a MacBook screen can be a significant issue, typically caused by:

• Hardware issue: The display itself could have a problem.
• Display connection issue: A loose interface or an unstable data transfer can also lead to display abnormalities.
• Overheating: Overheating can be caused by various factors, such as hot weather, running demanding tasks on your MacBook, or having many apps running in the background, which increases the workload on your MacBook's CPU.

How do I fix the black horizontal lines on my Mac screen?

Here are 5 effective methods to fix the black horizontal lines on your Mac screen:

• Solution 1: Restart your Mac
• Solution 2: Lower the temperature
• Solution 3: Reset the SMC
• Solution 4: Reset the NVRAM
• Solution 5: Use an external display