Second Display Powers Off Periodically

Hello everyone,
I can't find anyone with quite the same problem as me, so assistance would be appreciated. I run my macbook periodically hooked up to a second monitor. This works fine except that after a while (10 mins or so) the second monitor flicks off, and remains off. It's still got power, the macbook is apparently still feeding it data (my windows don't whiz back onto my main screen), but it's gone blank. If I switch the monitor off and on again, it comes back up. Recently it will then flick off again immediately. The solution appears to be to wait a few minutes, and then switch it off/on.
It sounds like something is overheating perhaps, but I'm baffled to know what. Any thoughts?
Many thanks for any ideas you might have.

Hmm. That's odd. I would suggest something in the Energy Saver control panel but there isn't an option for turning off on a per-display basis.
Have you tried another monitor to see if it has the same problem? If not, it may the actual display that is the problem and nothing wrong with your Macbook.

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That said I have a dual screen setup and my monitors retain the screen space settings.
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This topic first appeared in the Spiceworks Community

Closing MacBook lid w/ mini-DVI to second display turns off second display

I hooked up a MacBook to another display via the mini-DVI to DVI adapter but, when I close the lid of the MacBook, the other display goes off. The display settings are set to mirror and this doesn't happen with my MacBook Pro. With my MacBook Pro, I can close the lid and continue working with the monitor connected directly to the DVI port without issues. Anyone have any suggestions as, to use my MacBook this way, both displays remain lit which is kind of pointless. Thanks in advance,
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It is puts the Macbook to sleep when you close the lid.
All you need to do is press a key on the external keyboard or mouse and it will wake up the Macbook with the lid closed. If you are using bluetooth for your external devices, ensure that the "wake from sleep" option is enabled under Bluetooth setting in System Preferences.

Second display turned off

Hello guys
I plug a 2nd screen (Philips) on my iMac late 2013 (with GTX 780M 4G°) by Minidisplay to HDMI.
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Hello there, Zeustef.
The following Knowledge Base article provides some great recommendations for troubleshooting issues with display:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
No video or no signal, image distortion, "snow," or flickering
Check connections
When using an external display be sure to check the following:
If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Monitor and Display Adapter Table
About Mini DisplayPort to HDMI adapters
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Thunderbolt ports and displays: Frequently asked questions (FAQ)
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).
Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

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I'm in trouble. After upgrading to 10.6.8 my second display is no longer starting. I tried to repair the permissions, and after that I did the full combo update.
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well, some time has passed, here's where I'm at so far.
I tried a friend's samsung 24" screen and all was good with the world, no flickering on and off, no black outs nothing, for days it was all fine. I swapped the HP monitor back on and it went right back to its old ways. I called HP tech support, they decided that the monitor was faulty, i returned it to where I got it from and they have sent me a new one. Which was fine, for about 7 hours!!
So, to recap, the mini-DVI to DVI adapter is fine as it worked on the samsung screen, the HP screen is brand new and exhibiting the exact same issue as the first one (cant be 2 faulty ones surely) The samsung screen was fine.
This leads me to think that there is some compatibility issue between the 24" imac and this particular (hp zr24w) monitor.
I have followed apple support's requests for data logging but they cant find anything wrong there.
I'm out of ideas, any help would be GREATLY appreciated !!!
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Hi and welcome to Discussions,
it's avaiable in the US Apple Online Store http://store.apple.com/us/product/MB572Z/A?fnode=MTY1NDA5OQ&mco=MjkyNjI0MA
Not sure how to get it to china though.
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Message was edited by: Stephen Ethan
Message was edited by: Stephen Ethan

Long story short I solved the problem, and it was totally a model issue. It is the HP w2207, which apparently has a problem with iMac 24 inch, the nvidia graphics card, mini DVi to DVI and 10.4 in particular. You see these two devices, just don't get along very well. The imac tries to auto set the monitor at one resolutions and the monitor tries to auto set itself at another, and they will continue to do this indefinitely. However both when I switched to a VGA cable, which I believe prevents the monitor from auto setting itself, and when I upgraded to 10.5 solved the problem.
Personally I didn't mind the upgrade, as I was planning to do it anyway, and is definitely the better solution as there is noticeable difference in the color between the two cables.
Anyway thanks for the help everyone.
Message was edited by: Stephen Ethan

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Second Display Powers Off Periodically

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