You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: DeleteiMac
DeleteiMac Author
User level: Level 1
4 points

Thin Red Line

Why is there a thin red vertical line on my 2017 iMac display across all platforms. It's annoying and as the warranty just ran out Mac wants $800 bucks to fix???

iMac 21.5″ 4K, 12.2

Posted on Aug 10, 2022 11:40 AM

Reply
Question marked as Top-ranking reply
User profile for user: -Bubba-
-Bubba-
User level: Level 6
10,332 points

Posted on Aug 10, 2022 11:44 AM

By "across all platforms", you mean it persists on top of whatever is on the screen, correct?


As you've gotten it checked out already, it seems your only option for this hardware issue is to get it repaired.

View in context

Similar questions

2 replies
User profile for user: Mal-S
Mal-S
User level: Level 5
4,984 points

Aug 10, 2022 11:50 AM in response to DeleteiMac

Keeping in mind that we are just users like you and may not be able to pinpoint the cause.


I’m going to suggest that you attach an external display and see if it shows the red line. If it does show the line it would suggest a problem with the video chip. If the red line doesn’t appear on the external display it would suggest a problem with the built-in display panel.


A couple of basic things to try are to reset the SMC 3 or 4 times in a row and/or see what happens in Safe Mode.

Reply

Thin Red Line

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up