1#

My Mac book prob suddenly went into a black screen with a few vertical lines on it yesterday as I was in a zoom meeting and I haven't been able to fix it. What if there are colored lines on MacBook screen?



Possible Reasons for Vertical Colored Lines on MacBook Screen:

When there are horizontal/vertical lines appear on your MacBook screen,

There are several possibilities that may cause this problem,

1. The MacBook was dropped,damaged to the screen.

2. The screen cable is loose or damaged, causing problems with the screen display.

3. There is a problem with the computer's motherboard or graphics card.

Before repairing the problem of your MacBook screen vertical lines, the most important thing is to know which component is wrong. We can make judgments based on the following methods.


Diagnose Hardware or Software Issues

To diagnose whether it is a software or hardware problem, try connecting your MacBook to an external monitor.

If your MacBook does not have an HDMI port, you also need to prepare a USB-C to VGA converter.

Step 1: Connect your MacBook to the monitor.

Step 2: Set the display mode. Click System Preferences-Display-Arrangement.

Step 3: Observe whether there are vertical or horizontal lines on the external monitor.

If the external monitor displays normally after the above three steps, it means that there is a problem with the screen of your MacBook, and you need to replace the screen to fix the problem.

Conversely, if the image displayed on your external monitor is also display colored lines, it means that there is a problem with internal hardware such as the motherboard or graphics card, and you need more hardware detection.



Update Graphics Card Driver

The horizontal or vertical lines on the MacBook screen are related to the software, and the most likely culprit is your outdated graphics card driver. You should upgrade it to the latest version to resolve driver compatibility issues. For this, you can go to the driver download page of the computer manufacturer to obtain the appropriate graphics card driver.



Reset NVRAM/PRAM

Next to try is to reset NVRAM/PRAM.

Turn off your MacBook.

Find the following keys on the keyboard: Command (), Option, P and R.

You will need to hold these keys at the same time in next step.

Turn on computer.

Hold Command ()-Option-P-R before the gray screen appears.

Hold down these keys until the computer restarts, and then hear the startup sound a second time.

Release these keys.

Please use a magnifying glass to check the logic board LVDS connector, and check the main communication cable between the MacBook logic board and LCD to see if there are any visible signs of damage, such as a liquid short circuit or a connector melting.

If the screen cable is damaged

In other words, you spill a little liquid on the screen and then dive into the cable. You can buy a new display cable and try to replace it yourself.


If the MacBook LCD Screen is Damaged

You can buy a new one and try to replace it yourself by following the instructions in "How to Replace the MacBook Unibody Glass LCD"



Go to an Apple store or repair shop:

If you want to go Apple store, you will want to check if the MacBook is still in warranty.

For this, you will need these rial number of your MacBook:

Navigate to the Apple menu in the upper left corner of the screen

Click "About MacBook"

Click "More Information" to do so: Please go to the Apple Store and make a clear diagnosis.



If MacBook pro vertical lines on startup and you can't fix it at Apple repair store: it may be a good idea to seek a third party. For example, buy a replacement MacBook screen from another repair shop or online. GEMWON is committed to wholesale cheap laptop replacement parts for MacBook, helping you save a lot of MacBook screen repair costs.




Related Articles:

How to Fix a MacBook Stuck on White Screen


How to fix MacBook Screen Flickering


How to Fix MacBook White Screen of Death