I have a 2nd monitor plugged into my iMac via a dock, connected to the iMac with Thunderbolt 2. The monitor has started to go dark after waking from sleep. Any clues? It will work OK after a restart

I have a 2nd monitor plugged into my 27" iMac via a dock, connected to the iMac with Thunderbolt 2. The monitor has started to go dark after waking from sleep. Any clues? It will work OK after a restart

iMac (2017 – 2020)

Posted on Mar 9, 2023 9:24 PM

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Posted on Mar 10, 2023 5:04 PM

Hi guys, thanks for your helpful hints. This morning when I booted up the iMac, the monitor went dark from the start. I then plugged it to a MacBook Air and same story so, I think it might be time for a new monitor.

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5 replies

Mar 9, 2023 11:29 PM in response to MC36

What happens if you don't sleep it?


We need to see what all is running, a report from this will not display any personal info...


EtreCheck is a FREE simple little diagnostic tool to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. It will not display any personal info.

https://www.etrecheck.com/


Pastebin is a good place to paste the whole report if you capture the URL while there…


Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...

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I have a 2nd monitor plugged into my iMac via a dock, connected to the iMac with Thunderbolt 2. The monitor has started to go dark after waking from sleep. Any clues? It will work OK after a restart

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