Time Machine Black Screen Dual Monitors

I have an iMac 27 Retina with a 23 inch Cinema Display attached as an extended monitor (via thunderbolt)r, I have an external backup drive attached via USB. If I try to go into Time Machine to restore a file, Time Machine launches but gives me a black screen. However, I were to disconnect the second monitor and then launch Time Machine, all is well. Any ideas why connecting a second monitor would cause this problem?

This issue can be caused by a bug in the handling of multiple displays. Open the Mission Control pane in System Preferences and uncheck the box marked
Displays have separate Spaces
Test.

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Black screen when monitor connected to one graphics card port only

A couple of days ago did a back up using SuperDuper. The program is set to send the mac to sleep and when I tried to wake it got a black screen though the system seemed to have woken judging by the sounds. I've had issues after back up with the system freezing so tried rebooting as the first option, unplugging and reconnecting everything but still a black screen. Tried a second monitor and this worked but on reboot it too turned black. I then tried the second graphics card port and this time the screen worked and rebooted fine too. Since then I've tried the original connector/port and sometimes it works sometimes not and mostly even when it does work when I connect at first a reboot results in a black screen. The obvious logic is that this port has gone (ATI Radeon HD 2600) Apple say I have to return the whole kit to base for them to evaluate. I can't afford to be without the Mac for a week or however long it will take so I will just buy a new video card and install myself but just wanted any thoughts on the issue first - could it be anything other than the graphics card? Other hardware/software issues? Can't think why but don't want to shell out if that's not the problem.
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The 2600 does seem pretty rubbish - never had a Graphics card go on me before - and especially not in less than a year. Of course Apple said I had to return the whole machine to base rather than ship out a new card. It was less disruptive to shell out for a new card than lose the machine for a week or two under warranty. The GT 120 seems fine to me but if you need extra graphics support for 3D, gaming etc then I guess the 4870 is the more powerful option.
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Hi Peter,
Based on your description, the following thread also focused on this kind of issue and can be referred to for troubleshooting.
Server 2012 Black Screen on Login
http://community.spiceworks.com/topic/406717-server-2012-black-screen-on-login
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
Hope it helps.
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I think I found the problem - although it doesn't make sense. I backup to time machine through a thunderbolt (ethernet) connection due to very large photo files. It can take hours over wifi. Once I removed the ethernet connect I was able to view all windows. However, time machine froze consistently after I selected a backup date - and then file.

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Hello there, gwydno.
Great job with troubleshooting this on your own so far. One thing that you didn't mention that may help as a troubleshooting step is using Safe Mode. Just follow the instructions in this Knowledge Base article and restart:
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http://support.apple.com/kb/ht1564
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Release the Shift key when you see the gray Apple logo and the progress indicator (looks like a spinning gear).
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To leave Safe Mode, restart your computer without holding any keys during startup.
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Hello, I purchase a radeon 9800 pro 128mg, I have a mac G4 (Double mirrors) I am replacing the old Radeon 9800 pro 128mb. I am using 10.4 TIGER. I installed the card and I am still getting a black screen. my monitor works on my g4 powerbook desktop Help?

Question #1
Hello, I purchase a Radeon 9800 pro 128mb from ebay. I own a mac G4 ( double mirror doors) I am using tiger10.4 I am replacing my old radeon 9800 pro 128mb with one from ebay. I installed the card properly but I am still getting a black screen. why? Monitor works on my powerbook G4 laptop.
QUESTIN #2
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#1, tough to tell, is it using the VGA or DVI output?
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PCRinAZ wrote:
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Is that the one in several languages? If so, that's a *kernel panic.* They're usually hardware, but not always. Disconnect everything, except keyboard and mouse. Reconnect one at a time to see if you can find the culprit.
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http://www.index-site.com/kernelpanic.html
http://www.thexlab.com/faqs/kernelpanics.html
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Welcome to Apple Discussions.
I haven't heard of that problem however some people may have on the Time Machine forum, this is general iMac forum for Intel based machines. I would recommend you visit:
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Regards,
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Hi,
Welcome to Lenovo Community!
I’m sorry to hear about your situation and the issue persists even after performing OSRI (Operating System Re-Install) using OKR (OneKey Recovery). Please check if the issue persists after re-installing the Display & Chipset Driver for the computer.
If the issue persists, I would strongly suggest you to contact our Technical Support for further Assistance to get the details of the nearest Authorized Service Center to get the issue analyzed.
Click here to open a link where you can select the country and get the exact contact support number. I’m sure they will be a great help.
Do post us back for further queries.
Best Regards
Shiva Kumar
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Time Machine Black Screen Dual Monitors

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