MacBook pro screen repair

How to fix horizontal or vertical 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 or vertical lines on screen:

Are you tired of those annoying horizontal or vertical 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.


The MacBook Pro has an LCD or LED screen resolution display that is connected to the video card placed inside the laptop’s chassis. For an effective display purpose, it follows a particular process in which the binary data firstly goes to the CPU and then transferred to the video card.

The work of the video card is translated and put the data into an image form and shown that image on the computer display. So, if the settings, components, or any connection between the two is done in a faulty manner will cause numerous errors in the display including these horizontal lines in MacBook pro.

Temporary fixing of the screen

A quick and easy method for fixing your screen from the errors that occurred by the mismanagement of the connection between the internal hardware and display is to move your MacBook pro screen to different positions. You have to just close and open the MacBook’s screen and if it doesn’t work, they may have an option of changing the angle of the screen until the horizontal lines in the display disappear.

If adjusting the position of the display doesn’t help you or come up with any positive result for you. Then you might have a clear image in mind, that the fault is not related to your MacBook’s hardware, the problem must be an issue with internal software.

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 SMC of your MacBook: The first thing an individual must do is to immediately reset the SMC of the MacBook, to reset the SMC, you have to follow the steps.

There are two types of models available in the market, the one that has a T2 chip and the other one is without it. So, to reset the model’s SMC having T2 chip, follow the steps:

  • Turn off your device (MacBook Pro).
  • Hold the left control and press the Alt option placed at your left, with a right shift key.
  • Hold the above keys for at least 7-10 seconds. Without letting them release, press and hold the power button present on your MacBook Pro.
  • Now, additionally, keep all these four keys pressed for about 7-10 seconds more.
  • Now, release the keys you pressed and wait for at least 30 seconds, and after that turn on your MacBook Pro.

To reset the model’s SMC without having a T2 chip, follow the steps given below: –

  • The first step that always remains the same is to shut down your device (MacBook Pro).
  • Hold shift key of the left side and left control along with left Alt option key available.
  • Hold the above keys for at least 10-12 seconds. Without letting them release, press and hold the power button on your MacBook Pro.
  • Now, additionally, keep all these four keys pressed for about 10 seconds more.
  • Now, release the keys you pressed and wait for at least 20-30 seconds, and after that turn on your MacBook Pro.

Step 2: Reset NVRAM on MacBook Pro: After completing the above process, the individual has to reset their MacBook’s NVRAM with the following steps:

  • Restart your MacBook.
  • After turning your MacBook back on, press the command keys P and R and keep it held.
  • After hearing the start-up sound of the MacBook for the second time, then after you have to release the keys.
  • With the models having a T2 chip, you have to keep in mind before releasing the keys, after when the Apple logo appears and disappears for the second time.

Another method to fix the issue

Research indicates that most of the Apple engineers are well aware of this error popping up and they are still working to fix it as soon as they can. So, here is another simple method to fix the problem: –

  • Press the control key along with shift and eject, this will ultimately turn off your MacBook Pro and reset it.
  • Put your MacBook Pro to sleep, this you can do by going to the Apple menu closing the lid.
  • Let the MacBook sleep, till then wait. After then press any key button from the keyboard to wake the MacBook from sleep mode.

This is considered the most prominent and easy method to fix this error.

Attach External Screen

This is just an experiment to determine the cause of the problem whether it is from the display or the GPU. You have to just connect an HDTV with your MacBook Pro with its suitable connectivity cable, the same screen will reflect on your HDTV too. Observe that if the same horizontal lines are appearing on your HDTV or not.

If the lines don’t appear on the HDTV, then it makes clear that the problem is with your display. And if the lines appear on the second screen too, it means that your graphic card is at fault. Yet both are considered as hardware issues, the best solution is to contact an Apple service center.


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 discover a minor problem with your device, you can repair it yourself; however, if the damage is extensive, you should seek the assistance of a professional.

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