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Lines on monitor

Howdy! Gray horizontal lines have started sporadically appearing about 1.5 inches from the bottom of the display of my 13-inch, 2017 MacBook Pro running OS 12.3 There's also a discoloration at the bottom of the display.



It's a hardware issue, I suspect, rather than software as screenshots won't capture the lines. They also appear when I boot into recovery mode.


To troubleshoot, so far I've

  • reset the PRAM
  • reset the SMC
  • rebooted and unplugged all peripherals
  • ran First Aid


Any idea what might be causing the problem—and how I can fix it?


Thanks!

MacBook Pro 13″, macOS 12.3

Posted on Mar 22, 2022 3:44 PM

Reply
Question marked as Top-ranking reply

Posted on Mar 23, 2022 8:10 AM

The Zach wrote:

Howdy! Gray horizontal lines have started sporadically appearing about 1.5 inches from the bottom of the display of my 13-inch, 2017 MacBook Pro running OS 12.3 There's also a discoloration at the bottom of the display.


https://discussions.apple.com/content/attachment/bca07e77-d384-4828-9c6e-c5dd22d0727a

It's a hardware issue, I suspect, rather than software as screenshots won't capture the lines. They also appear when I boot into recovery mode.

To troubleshoot, so far I've
reset the PRAM
• reset the SMC
• rebooted and unplugged all peripherals
• ran First Aid

Any idea what might be causing the problem—and how I can fix it?

Thanks!


good trouble shooting list to rule out software


If you plug into an external monitor to test—this would be insightful by comparison. If no issues externally it points to display/display assembly/projector cable/ or connection


You can try Use Apple Diagnostics to test your Mac...not as definitive as Apple's own AST2 (Apple Service Toolkit) back bench diagnostic, but may kick out an error code.

Use Apple Diagnostics to test your Mac - Apple Support


if no insight or resolve—



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"— or see software help

Genius Bar Reservation and Apple Support Options - Apple


Outside the USA

https://locate.apple.com/country



Learn how to get your Mac fixed and how much it will cost. Mac Repair - Official Apple Support

Get your Mac ready for service - Apple Support Get your Mac ready for service - Apple Support



Check your coverage

My Support - Official Apple Support


1 reply
Question marked as Top-ranking reply

Mar 23, 2022 8:10 AM in response to The Zach

The Zach wrote:

Howdy! Gray horizontal lines have started sporadically appearing about 1.5 inches from the bottom of the display of my 13-inch, 2017 MacBook Pro running OS 12.3 There's also a discoloration at the bottom of the display.


https://discussions.apple.com/content/attachment/bca07e77-d384-4828-9c6e-c5dd22d0727a

It's a hardware issue, I suspect, rather than software as screenshots won't capture the lines. They also appear when I boot into recovery mode.

To troubleshoot, so far I've
reset the PRAM
• reset the SMC
• rebooted and unplugged all peripherals
• ran First Aid

Any idea what might be causing the problem—and how I can fix it?

Thanks!


good trouble shooting list to rule out software


If you plug into an external monitor to test—this would be insightful by comparison. If no issues externally it points to display/display assembly/projector cable/ or connection


You can try Use Apple Diagnostics to test your Mac...not as definitive as Apple's own AST2 (Apple Service Toolkit) back bench diagnostic, but may kick out an error code.

Use Apple Diagnostics to test your Mac - Apple Support


if no insight or resolve—



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"— or see software help

Genius Bar Reservation and Apple Support Options - Apple


Outside the USA

https://locate.apple.com/country



Learn how to get your Mac fixed and how much it will cost. Mac Repair - Official Apple Support

Get your Mac ready for service - Apple Support Get your Mac ready for service - Apple Support



Check your coverage

My Support - Official Apple Support


Lines on monitor

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