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
