The appearance of vertical lines and horizontal lines on the Macbook's laptop screen is an annoyance. Although it does not affect the normal operation of the notebook, these lines look very ugly and uncomfortable. Here are the common causes and solutions for the appearance of vertical lines and horizontal lines on the Macbook notebook screen. I hope you can help.

Common causes

1, Macbook notebook screen position was bumped, squeezed, causing damage to the screen resulting in lines;

2. The screen cable is loose or damaged, resulting in screen display problems;

3. There is a problem with the motherboard or graphics card of the Macbook laptop.

Solution

       First, we use the exclusion method to solve the problem of the Macbook's laptop screen. For the 3 common reasons mentioned above, the 1 and 2 points are all about the screen itself, so we can connect an unproblematic screen to detect you. Did the Macbook laptop screen really have a problem.

       1. Prepare a monitor without problems. If your Macbook does not have an HDMI port, you need to prepare a USB-C to VGA converter.

       2. Connect your Macbook to an external monitor and turn it on;

       3. Open the setting display mode in Macbook, click System Preferences - Display - Arrange, and then carefully observe that there is no vertical or horizontal line on the external monitor;

       4, if the external display shows normal, then your Macbook laptop screen or screen cable problems, you need to change the screen or disassemble the screen line to solve this problem.

       Second, if you find an external monitor screen also appears on the horizontal or vertical line, then your Macbook laptop motherboard or video card internal hardware problems, need to find a professional maintenance personnel to help solve.