Gray lines on iMac M1

You're experiencing what many other M1 iMac owners 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

Others have reported that the repairs will cost about $600 US.  That's about ½ of a new Mac Mini M6.  

Amoung the options you have are these 4 to consider:

#1 - pay the ~$600 US price for  Apple or an Apple Authorized Service Provider to repair the monitor (which is about ½ of a new M6 Mac Mini).

#2 - get a monitor and use it with your M1 iMac.  You can get a 27" or 32" monitor from $140 US on up. 

#3 - get a new Mac.  If considering this option consider the following: a 12‑core CPU, 12‑core GPU Dual 16‑core Neural Engine Mac Mini M6 with 16 GB RAM and 1 TB SSD ($1399 US) with a 32" LG 4k monitor ($331 US) from Amazon.com)  is $1716 which is $450 less than a similarly configured new 24" M4 iMac ($2199 US). Keep your keyboard and mouse from your current Mac for use with the Mini. 

#4 - keep tabs on the Apple Service (Recall) Programs - Apple Support in hopes that a recall/repair program is activated.

Just some food for thought.

likely hardware failure

Horizontal lines appear on iMac 2021 24''… - Apple Community

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Welcome and thank you for reaching out. 🤗

When there appears to be a problem with the Mac, only a certified Apple technician can determine the cause and offer a complete solution.

Therefore, I recommend service.

Service Checklist:

• Mac service pricing.
• Check AppleCare Coverage.
• Get your Mac ready for service.

Service Appointment:

• Start a Service Request.

Contact Support:

• United States: 1-800-APLCARE.
• Contact Support.

Additional Support:

• Mac Support.
• Mac User Guide.
• Check Repair Status.

Good luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer

Posting here among other end users does not fix system issues. Using this will give Apple a sense of the scale fo the problem:

Feedback - iMac - Apple

The issue, with gray stripes, on the screen, shouldn't even, be happening, on a "new" 2021 M1 iMac!

Hardware failure........................

Maybe, Apple, should have stuck, with Intel?

Just my opinion!

Maybe, it's not true, but I´m sure, I´ll hear, from you out there!

"Therefor I recommend Service"

BRAVO.........Smilin Brian!

Apple, made some bad Graphic Chips, on their 2020 iMacs?

And is is then, up to us consumers, to correct, the mistake?

I´m having, a little trouble, following you, on this!

The OP "gregbdrose" Can't use this for anything?

Here is the original image. Oddly enough, they are now gone! I turned the mac off/on when they first appeared 4 days ago, but the lines remained. Nothing changed since then and the mac has stayed on. They were also there earlier today before they just disappeared. I am guessing it's likely they will reappear again, but certainly hoping it’s a one-off.

Mine just started doing this too. I'm very disappointed because otherwise this iMac has been great and I'd hoped to get many more years of use out of it. Due to recent price hikes, replacing this with an identical configuration would cost me $2200 (+ tax).

Does anyone know if I pay for a replacement screen, have they fixed this defect? In other words, will the replacement screen end up with the same problem?

Sorry to hear. The price hikes are holding me back as well, I am more concerned that something similar may happen again on a new mac (btw. if the news is correct, a new mac is due this year). That's a good point about a new replacement screen causing the same issue. I didn't think about that.

Jim Gottlieb wrote:

Mine just started doing this too. I'm very disappointed because otherwise this iMac has been great and I'd hoped to get many more years of use out of it. Due to recent price hikes, replacing this with an identical configuration would cost me $2200 (+ tax).

Does anyone know if I pay for a replacement screen, have they fixed this defect? In other words, will the replacement screen end up with the same problem?

Is that US dollars? That's almost the price of a new iMac and more than a Mac Mini M4 with a 32" 4K monitor.

Can I assume that you are not in the US at the present time?

I have not heard of replacement screens failing.

Thanks.

Your welcome. I'm sorry to be the bearer of bad news. 😞

Keep your 🤞from here on out.

You're welcome. 👍

Yes, USD. The price of a replacement 16GB/1TB/4USB iMac.

Good to know about the replacement screen.

+1

For other examples, have a look at > Persistent horizontal lines appear on iMa… - Apple Community