Random Sudden Lines on Mac Display

Hi,

Startup in Safe mode then normal boot could solve the issue.

If it doesn't help, try to run Apple Diagnostics if it reports something display and graphic processor related error(VFD001 to VFD007).

Start up your Mac in safe mode - Apple Support

Use Apple Diagnostics to test your Mac - Apple Support

312aseem Said:

"Random Sudden Lines on Mac Display: Hi All, So I was in school and suddenly my mac had some random lines that were quite thin and covered up the whole display. [...]Please HELP because this just doesn't make sense as I cant figure out if it is a hardware issue or a software issue."

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Get this Serviced:

Your Screen is apparently failing. This needs to be fixed. What is the year of your MacBook Air? My 2017 MBP had this issue, and its screen was replaced 11 times. So, this is known issue of that year's MBPs, and has been reported plenty of times on these forums.

Use Send-In Service:

Contact Apple Support:

• Contact Us - Choose Locations
• USA: 1(800)MY-APPLE
• Proceed from there as Necessary

Apple Send-In Service

At the moment, with the Coronavirus Pandemic, many Apple Stores are still closed at the moment. So, Send-In Service may be the only available option for getting this serviced. So, have Apple take this in through Send-In Service. They will send you a box; you would ship it out to Apple; their engineers would look at it; and the would send it back to you.

OR...

Take it to you local AASP (Apple Authorized Service Provider):

1. Go Here: Find Locations - Apple Authorized Reseller
2. Click: Service & Support
3. Enter: your location information
4. See: if there is an AASP nearby
5. Contact: an AASP that shows up, and find out more about the services that they offer to fix the device

312aseem Said:

"Random Sudden Lines on Mac Display: Do you guys think it is both a hardware and software issue at the same time? [...]Already have that its plugged in but it shows the same thing on the display. Attached is an image of my problem:"

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Verify Hardware and Software:

Go Here: How to Create and Use a Black Screen Saver (To Avoid Sleep Mode) - Great for Music! - User Tip. Playing some music with a black background, you would hear music, but the screens have would be black, hence you could see if colors are the still issue while on screensaver, seeing if this is both a hardware and a software issue both running at once.

It is virtually impossible to diagnose that type of issue without examining it and testing the components, so there is really no way for us to give you an accurate diagnosis via "long distance".

For a less expensive solution, you could also look into getting an external monitor and hooking that up if that would be compatible with your model.