Imac M1 screen issue

You're probably experiencing what many other M1 users are experiencing: the following topics illustrate the Silicon M1 iMac Display problem:

Screen Failure on 24-inch-iMac, M1, 2021 - Apple Community

Persistent horizontal lines appear on iMac Screen - Apple Community

Horizontal Lines on Screen of iMac, 24", 2021

Horizontal black lines covering bottom 3rd of 2021 M1 iMac screen

Grey horizontal patches on my M1 iMac 2021 model

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

Horizontal Lines on 2001 M1 iMac Display

M1 iMac Display vertex heating to scorching 55°C  — Seeking Advice on Escalation

Horizontal Lines on iMAC with M1 chip

Currently there is no Service Program for that issue but keep checking this website in case Apple instigates one: Apple Service Programs - Apple Support.  

Currently the only options are to:

1 - pay to have the screen replaced.

2 - get a 3rd party monitor and use it while darkening the iMac's screen.

3 - get a new Mac.

I wish I had better news to tell.

Probably the one discussed here in many threads. Click on some of the obvious ones like this one:

Persistent horizontal lines appear on iMa… - Apple Community

if you elaborate a bit, then it would be easier for people to pitch in