1 pixel wide straight vertical line, from top to bottom edges, pixels won't turn on

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Level 1

13 points

1 pixel wide straight vertical line, from top to bottom edges, pixels won't turn on

Vertical line of pixels won't turn on. It runs from the top edge to bottom edge of screen, perfectly straight line, looks like 1 pixel wide. It's under the glass and appears in Finder and when any app is running in area of the line. All videos and graphics not overlapping the line are normal. This started about 1 week ago. Restart, rescue, removing all peripherals, etc makes no difference. No obvious damage to structure of computer, everything else is normal. 2017 iMac 5k, 27", Big Sur.

Posted on Oct 8, 2021 11:14 AM

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Answer 1

Jack-19

Level 8

46,266 points

Oct 9, 2021 8:43 AM in response to MIV204

+1 - Post the EtreCheck report.

However, chances are, this indicates a hardware issue, and it must be repaired by Apple at an Apple Store.

Jack

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Answer 2

rkaufmann87

Level 10

148,570 points

Oct 8, 2021 11:31 AM in response to MIV204

Please navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.

When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again.

For instructions on how to download your EtreCheck report and attach it to your reply to this message please click https://discussions.apple.com/docs/DOC-250000211

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Answer 3

MIV204 Author

Level 1

13 points

Oct 9, 2021 6:44 AM in response to rkaufmann87

rkaufman87, thank you for your suggestion to use Etrecheck. I did run the report and prefer not to put it on line publicly. The report found some unsigned files, some adware and blocked system extensions. Nothing related to the screen or hardware which is more likely the issue. Any software I run that overlaps the bad-pixel vertical line, will show the line, while that same window moved out of the bad-line territory will appear perfect. Is there a utility to test the screen and pixel functioning? I know the iMac has a built in hardware test but it is not raising any alarms. Below is a pic showing the line running thru a Safari window.

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Answer 4

rkaufmann87

Level 10

148,570 points

Oct 9, 2021 8:38 AM in response to MIV204

There is ZERO personal information in an EtreCheck report. It does us no good if you don't have multiple sets of eyes view it. I respect your decision however if you don't post the report then we are done here as there is nothing for us to diagnose. It is kind of like having a health issue and refusing to go to the doctor to have get their opinion.

Adware should be removed using Malwarebytes.

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Answer 5

MIV204 Author

Level 1

13 points

Oct 9, 2021 12:20 PM in response to rkaufmann87

Understood, I appreciate your time. I'm sure I have a hardware/screen problem, I thought someone here might recognize it. In any case it will have to go to Apple eventually. Thanks again.

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Answer 6

Jack-19

Level 8

46,266 points

Oct 9, 2021 12:22 PM in response to MIV204

You should still post EtreCheck though, especially if you have adware and other software issues!

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1 pixel wide straight vertical line, from top to bottom edges, pixels won't turn on

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