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Helpful answers
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Jan 16, 2016 7:51 AM in response to Nexus1021by norm123,Hey Nexus1021,
I understand that you are having issues with seeing your external display show up after waking from sleep. Let's see if we can get that worked out.
I would start with taking a look at the article below. It will go in details on troubleshooting multiple issues with no image on the display. One thing to look at is in System Preferences > Displays, and see if you can detect the display. You might also want to try resetting the SMC and NVRAM.
Get help with video issues on external displays connected to your Mac
https://support.apple.com/en-us/HT201177
Take it easy -
Jan 16, 2016 7:56 AM in response to Nexus1021by Rudegar,I have a mid 2011 imac 21" connected using a tb -> dvi connector to various external monitors during it's life currently to a 27" asus
never had that issue by what means do you connect the external monitor ?
