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2017 27" Mac Graphic card issues?

Hi I have a 2017 27" iMax with the 3.4 GHz i5 and Radeon Pro 570 4GB graphics card. I started having this issue 6 months ago and it was rare to occur and fixed itself quickly. It now happens a few times a day and can last for 5 mins (if I am unlucky). A you can see in the picture the screen splits itself in half horizontally and the the right hand side splits itself in half vertically. All 3 screens show the same thing but color is off and it is all scrunched up. I comes right by itself.

I have factory reset the machine and reset the PRAM/NVRAM. All to no avail. It will happily drive external monitors with no issue. Any one got some words of hope for me :-).

Posted on Jul 3, 2022 12:05 PM

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Iron Paw Author

Level 1

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Posted on Jul 31, 2022 2:02 PM

Closing this out in case anyone else has my issue .... I decided to start simple. I started by cracking open the iMac and replacing the LCD data cable. .... Now this never ever happens to me but..... that fixed it :-). So I got away with spending about $22 on the part, replacement adhesive strips, and a very cheap tool to break the existing adhesive. I have had it taped up for a week and a half now and it is good as gold. Since I have it opened up I'm going to take the opportunity to swap out the HDD with an SSD.

So if anyone else sees what I showed in the picture above... try replacing the cable first.... Maybe you will get lucky like me.

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Iron Paw Author

Level 1

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Jul 4, 2022 10:45 AM in response to den.thed

Not guilty 😄. I bought it new and it has never been cracked open.

Although I see it happening in the not too distant future if I can be confident it's the display panel that is causing this problem.

Iron Paw Author

Level 1

4 points

Jul 3, 2022 1:40 PM in response to ku4hx

sorry, forgot to mention that I had done that. It reported nothing wrong. ... which is a shame since there is clearly an issue

Iron Paw Author

Level 1

4 points

Jul 3, 2022 2:55 PM in response to rkaufmann87

Hi, here is the etrecheck report. Never done one of these before.

EtreCheck report

Iron Paw Author

Level 1

4 points

Jul 3, 2022 6:29 PM in response to rkaufmann87

Open VPN is not anti virus software. It's a virtual private network and it's used to burrow into the network of a company I do some work for

Iron Paw Author

Level 1

4 points

Jul 3, 2022 7:03 PM in response to Jack-19

Thanks Jack... I figured this would be the case. I had my fingers crossed that perhaps it was something others had hit with an easy fix. Ah well.

Iron Paw Author

Level 1

4 points

Jul 4, 2022 12:03 PM in response to Allan Jones

It can definitely drive external monitors. I have 2 * 32" 2K ASUS monitors hooked up and they work faultlessly. It's just the iMac display itself that goes crazy.

Allan Jones

Level 9

79,040 points

Jul 4, 2022 12:47 PM in response to Iron Paw

That's good news!

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2017 27" Mac Graphic card issues?