Horizontal lines at the bottom of iMac(M1,2021) screen

Bought this device on Dec 2021, and today the screen shows many horizontal lines at the bottom of the screen and this is also a grey area showed up, which also blinks at a frequency ~2-5 seconds. This is very annoying and makes it unusable. Since I had many devices, e.g 2018 MacBook Pro 15, 2022 M2 MacBook Air, 2022 M2 Mac Mini, so did not use iMac like 7(days/week)*24(hours/day). There are many reports on this issues which can be found on iFixit and Youtube. I think it's a manufacturing or design issue, or just bad parts causing this problem. Had old iMac being used for >10 years and had no issues. Also other displays (Aoc, Dell, LG, Samsung) I have used (1-8 years) never had this kind of issues. Apple should investigate why this occurred and repair the faulty parts.



[Re-Titled by Moderator]

iMac 24″, macOS 14.4

Posted on Apr 27, 2024 7:44 PM

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Posted on Jul 19, 2024 1:46 AM

I’m experiencing the same issue with my iMac 24" M1. I got it in June 2022, and today, I encountered the same problem. The top part of the screen shows lines and flickers. Additionally, the top left corner of the screen becomes extremely hot to the touch, almost burning my finger if I hold it for more than a few seconds.

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Jul 19, 2024 1:46 AM in response to LuciferYY

I’m experiencing the same issue with my iMac 24" M1. I got it in June 2022, and today, I encountered the same problem. The top part of the screen shows lines and flickers. Additionally, the top left corner of the screen becomes extremely hot to the touch, almost burning my finger if I hold it for more than a few seconds.

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Jul 6, 2024 9:52 AM in response to LuciferYY

LuciferYY wrote:

Nope. I don't use this device quite often and I have an external monitor so it doesn't really bother me that much. Repairing it costs more than 50% of its original value, thus it is better to buy a new device than repairing it. It is for sure a manufacture or design defect. I will not buy this device if they tell me that the monitor will fail after two years. Apple should launch service program for this issue.

If enough people tell Apple about the problem at iMac Feedback they might do a recall program on it.

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Sep 10, 2024 8:34 AM in response to Keith Barkley

After reading all the threads related to this issue, I've contacted Apple chat support and tried to negotiate a free repair for this widespread issue.


Apple chat support said that they don't have the authority to do this and ask me to contact phone support. Phone support said the same thing and asked me to take the iMac and go to Apple store. And Apple Store support said they can't do anything unless the issue appears in this Apple Service Programs list, and he suggested me to leave a message in Apple Feedback.


Everyone, please leave a feedback to make Apple fix the issue.

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Jul 6, 2024 7:33 AM in response to cinderella_

Nope. I don't use this device quite often and I have an external monitor so it doesn't really bother me that much. Repairing it costs more than 50% of its original value, thus it is better to buy a new device than repairing it. It is for sure a manufacture or design defect. I will not buy this device if they tell me that the monitor will fail after two years. Apple should launch service program for this issue.

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Dec 9, 2024 6:22 AM in response to LuciferYY

I’m experiencing the same issue with my iMac 24” M1. I purchased it in August 2021, and today I encountered the same problem. The top part of the screen shows lines and flickers. Additionally, the top left corner of the screen becomes extremely hot to the touch, almost burning my finger if I hold it there for more than a few seconds. I’ve noticed that many people are experiencing similar issues with the iMac M1 chip model. Apple should address this issue immediately and provide a permanent fix at no cost. Otherwise, people may lose trust in Apple products. At the very least, there should be a software patch to resolve this display issue in the iMac M1 chip model.

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Jul 12, 2024 4:07 AM in response to LuciferYY

I am having the same issue. Bought mine in Dec 2022. And horizontal lines started appearing on the screen and has been flickering since. Had Apple call me and unfortunately, they say they can't cover the repair. Disappointing. Especially that it appears to be a design flaw as it's happened to multiple users of the same product.

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Sep 19, 2024 4:45 AM in response to vinayak245

It is a common hardware fault as can be seen from various posts in the Apple Community pages.


I checked with the Apple service provider. The cost of repair is Indian Rupees 50,683 =USD 600 at the current exchange rate (which is around USD 2,100 in Purchasing Power Parity).


My thoughts on this are unprintable.


Thanks for all your help.

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Oct 7, 2024 3:17 PM in response to MichaelWarsaw

It is hard to tell from the number of posts here. We are an emergency room, we might be seeing the majority of the cases, or maybe only the tip of the iceberg, it is hard to tell.


Only Apple can tell for sure, since they now how many screens are being used for the repairs.

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Sep 15, 2024 2:39 AM in response to vaishnavi66

You won’t find official updates here for this or any other issue. Your only option is to schedule an in-store repair appointment with Apple/Apple-authorized service provider. If their resolution is unacceptable, you can vent your frustration here Feedback - iMac - Apple. Good luck!


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Horizontal lines at the bottom of iMac(M1,2021) screen

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