Horizontal Lines on Screen of iMac, 24", 2021

Just ran into this issue on my M1 iMac, purchased in July 2021 in Malaysia. Took it to Apple and was quoted a very expensive repair cost. No compromise, no goodwill offer. Apple wasn’t willing to help at all. Really disappointing.

Keep checking this Apple website for a Service program for the M1 iMac screen: Apple Service Programs - Apple Support

The screen broke permanently due to the horizontal lines defect. The problem lies in a cable that also powers the LCD, which is located on one of the tops of the screen. this cable (of the FFC/FPC type or Flat Flexible Cable / Flexible Printed Circuit), has to sustain a very high voltage (around 50V) to power the LCD (despite the iMac's power supply being 15.9V), and it heats up a lot! it starts to burn out and degrade at the connector, to the point where it lets the signals leak between the various connectors and short-circuits some of them, which ends up causing those lines and in the end it breaks.

That’s planned obsolescence for you. My 2006 MacBook Pro (I know it’s not an iMac) works fine including the screen (I think it has a CCFL backlight) but this happens with about everything these days sadly. I’ve *** a microwave that’s under a 1 year warranty that’s losing power and before that one we had a sharp microwave from the early 90s

Not at all planned obsolescence, as has been mentioned it has happened to a small subset of users, your luck just ran out. We understand your frustration, who wouldn't be frustrated after only 4 years of use but it's not what you claim.

iMac screen failure..

Horizontal lines at the bottom of iMac(M1… - Apple Community

Also...

Persistent horizontal lines appear on iMa… - Apple Community

Keep checking this Apple website for a Service program for the M1 iMac screen: Apple Service Programs - Apple Support

I ** experiencing the exact same issue. Check out the bottom of my screen (image)

[Edited by Moderator]

Exactly the same issue happened starting yesterday, been talking to Apple support and kept asked me to bring it over to Genius Bar

[Edited by Moderator]

That’s ether a bug or there are dead pixels

Unfortunately this is happening to my iMac as of this morning.

please explain with model you have and date of purchase.. we can make an idea in which Mac can happened this tragic bug... thanks any detail is useful to understand

https://www.macrumors.com/2024/10/01/m1-imac-horizontal-lines-issue/

I have had no problem with my M1, 16GB, 512GB iMac. My vote FYI.

Having the same issues on iMac. Disappointed b/c this is my personal computer.