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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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Question marked as Top-ranking reply

Posted on Jul 6, 2024 9:52 AM

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.

50 replies
Question marked as Top-ranking reply

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.

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.

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.

Apr 28, 2024 8:57 PM in response to LuciferYY

Well I understand and I have seen about 200 posts on these forums about it, I have no idea how many machines that represents however even if it's about 500-1000 machines that is a relatively small number in the grand scheme of things. It's definitely no fun when it's your machine and you don't have AppleCare though.


I suspect you represent a very small minority in that you only own your devices about 2-3 years, my current machine is 4+ years old (2020 27" iMac) and I plan on keeping it until as long as it can run current versions of Mac OS. That being said, your machine needs may be significantly more demanding than most so buying the latest and greatest may make a lot of sense. Even if you only own 2-3 years AppleCare may make sense for years 2 & 3, that being said obviously it's your decision and as I mentioned already this time your number just came up!

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

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