Currently Being ModeratedMay 24, 2013 12:52 AM (in response to kevinr8)
Have the same problem since yesterday. Tried to jumpstart it with the colleague's macbook, with no help.
After plugging other Thunderbolt display in my macbook just for second (that is third person's display ) and then mine, everything seems to work just fine. Only problem is that I have to repeat this every morning now? What gives?
P.S. Neither my bacbook nor my display are Thunderbolt.
reseting SMC did not help
Message was edited by: Gvozden
Currently Being ModeratedMay 24, 2013 6:15 AM (in response to kevinr8)
Hello there Kevin,
I was researching the issue you describe and found 2 resources that may help. First there is this section from Apple Cinema Display: Troubleshooting steps found here: http://support.apple.com/kb/HT2810
No image on the screen
- Make sure the computer is turned on.
- Make sure the power cord is plugged in properly.
- Make sure the display cables are connected to your computer properly.
- Make sure the DVI or Mini DisplayPort display cable is connected securely.
- Make sure your computer is not in sleep mode.
- Make sure the brightness is set properly. The brightness control is under the right front edge of the display.
- Check for and install all available software updates. Software updates may provide solutions to many common issues.
Note: If the display power cord is plugged into a grounded wall outlet or power strip, find out if power to the outlet has been interrupted. You can test the outlet by plugging in something that you know works, like a desk lamp or radio.
If those steps don't get the display working then here is another article, with some pretty in depth troubleshooting for displays named Apple computers: Troubleshooting issues with video on internal or external displays from http://http://support.apple.com/kb/ht1573
Currently Being ModeratedJun 21, 2013 1:55 AM (in response to kevinr8)
I have been having a similar problem. The display is recognised by the Mac, but it is black. It started happening after a software update. Unplugging and replugging initially fixed it. Then problem returned. Tried reseting SMC; then zapping PRAM brought it back. Then after sleep, it stopped working again.
I have just fixed it again. This time I returned to basics: historically, most problems on OS X are caused by 1. corrupt caches, 2. corrupt preferences, or 3. hardware faults. Since the problem affects both user accounts, I searched *all* the preferences and safe preferences and found all the instances with "displays" in the name and trashed them. On restart the monitor has come back again. Fingers crossed.
FYI: you can clear your caches with a Safe Boot.
1. Startup holding SHIFT key until you see progress bar. It will be a slow startup process.
2. At login screen, click RESTART.
3.4Ghz Intel Core i7 iMac (2012)
Mac OS 10.8.4
24" Cinema Display with Mini DisplayPort plugged into Thunderbolt port on iMac.