PaulyMSU1 wrote:
Recently, I've seen a series of flickering gray/black horizontal lines at the top of my screen. They start after the computer has been running for awhile and then get worse and worse over time. I can shut down my computer and the go away, also the longer my computer is off the longer it takes for them to appear on the screen when I'm using it again. Anyone know any fixes??? I've tried resetting the NVRAM, restarting in safe mode, and resetting the SMC; none of those solve the problem. Also, its weird they don't show up with a screen shot.
To determine if this is a display/screen issue— take a screen shot. The Screenshot comes from the GPU directly. If no distortion then you can suspect the display itself or the display projector cable has a fault.
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment
Make an appointment for a "hardware issue"—
https://www.apple.com/retail/geniusbar/
Outside the USA
https://locate.apple.com/country
From iOS device using the app to make a online Genius Bar appointment is easy:
https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8
(note: due to the temporary closure of Apple Stores and the staggered reopening there may be some delays.
ref: https://www.apple.com/shop/browse/store/temporary_closures )
“Mac notebook, contact us and we'll send you a box you can use to ship it to an Apple Repair Center. We'll return your repaired product to you as quickly as possible. Depending on where you get service, you might be able to check the status of your repair online.” Start a service request https://support.apple.com/mac/repair/service
Call Customer Support (800) MY–APPLE (800–692–7753)
or on line https://getsupport.apple.com/
or call AppleCare Support at 1-800-APLCARE (800-275-2273)
Outside the USA—Contact Apple for support and service by phone
See a list of Apple phone numbers around the world.
https://support.apple.com/en-us/HT201232
Learn how to get your Mac fixed and how much it will cost.
https://support.apple.com/mac/repair/service
Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095
