Selectively turn off second monitor

I am running 24" iMac with a second monitor connected via VGA (no DVI on second monitor). When I do not want to use the second monitor, I have to unplug it from the iMac so the mac stops using it. Is there an easy software switch or, preferably, a keyboard switch (like a windows F key), that I can press to disengae/reengage the second monitor? I suspect there is something in the monitors control panel, but I don't want to dive down that far every time I want to use it/not use it.

I am experiencing the same problem with a Samsung Aquos 52" connected thorough a Onkyo receiver/amplifier. The connection is DVI to HDMI to Onkyo amplifier and HDMI-HDMI to the TV. The main 23" Cinema Display flashes during turning on an off of both of TV and the amplifier and even when the TV is off and the amplifier is on, unless you restart the computer, it would keep detecting a second display, the only solution so far was to unattach the second display DVI to HDMI cable from the computer. Otherwise, several freezes occur after several flashes of the cinema display and eventually either the dock o the whole screen would freeze...Anyone knows how to avoid this issue? Btw, my id card is NVIDIA GeForce 6600.

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Turning off second monitor

I recently purchase a Sharp LCD television and I'm now using it regularly with my G5 in conjunction to my 20" cinema display. When I watch DVDs on the Sharp it's very annoying/distracting to have the 20"'s backlight glowing. I was wondering if there was a way to completely turn off a display independently from another. Turning off the backlight could potentially be acceptable as well.
Any help would be appreciated, thanks.

Hey Karl,
I have the clear cinema display using ADC connection. I understand that the aluminum display has the option of simply turning off the display as opposed to putting the system to sleep. Do you know if it's possible to do this with my display, the option is not there in the preferences.
Thanks

Can I turn off the monitor for Mac Mini and use it as a music server?

I am in the process of upgrading my PC most likely to a Mac product. With the non-server version of Mac OS X, can I turn off the monitor connected to a Mac Mini and use it as a streaming server? Or I have to get the server version of OS X to do that?

I plan to run Logitech Media Server on the Mac to stream music to players. Each player interacts with the Logitech Media Server to select songs to stream. When I turn on a player, it will wake up the computer from the sleep mode.
Currently, this Logitech Media Server runs on a Windows Vista machine and it will keep the PC from entering sleep mode while playing the songs. After I play the last song, the PC will start the idle count down and then enter into sleep mode.
Do you see any problem with my intended use of a Mac Mini?

How can I turn OFF audio monitoring during capture from tape?

FCP has a very useful check box that allows you to turn off audio monitoring during capture, so you can listen to other things whilst the batch captures. Is there any way to do this in PP? If not, how can I make a feature request?
I'm using PP CS6.
Thanks for any help.
Dominic

The only other solution I can offer is to go to "edit" "preferences" then select "playback". Under playback set the default audio device to your capturing device instead of the adobe desktop audio. This will allow you capture but not have to listen to whats being captured. However once it's done capturing you'll have to set it back to adobe desktop audio otherwise you can't hear what you're editing in your timeline.
Other than that I'm out of ideas sorry.

T43 & "Preparing to turn off the monitor"

A recently got a second-hand T43 (I will avoid the current shallowscreen laptops as long as I can!), and one thing that bugs me is that Fn+F3 "turn off screen" seldom works (Windows XP SP3). Usually I just get the dialog saying "Preparing to turn off the monitor", but nothing happens after that. I read somewhere that Windows Media Player can cause this when running, but it is not running. And why should it matter anyway? Is there any way to force the screen to be turned off despite running programs?
Also, it would be nice if this action locked the screen, or if it was available after locking the screen. Is this possible in any way?

Hi! This is completely Windows-specific, and I found it on a website, so I don't take credit for it. Hopefully you do know how to use JNI, so here's the C code you could try out (no I haven't tried it yet).
JNIEXPORT void JNICALL Java_JNative_turnOffMonitor (JNIEnv *env, jclass cls)
SendMessage (HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, 2);
}2 turns off the monitor, HWND_BROADCAST sends the message to all top-level windows, 1 sets the monitor to low power and -1 switches the monitor back on. Please use at own risk, and you'll probably want to have some more error handling in your code if you do plan to use it. You will need to include windows.h and user32.lib (unless you are dynamically linking) for the code to compile.
Hope it helps.
Cheers
P.S. Here's the website I found it in (note, the code's in Delphi, so I just took the API calls, and modified the first parameter to HWND_BROADCAST). http://chiragdalal.tripod.com/howto/monitor_on_off.html

Cannot turn off MBP monitor/display

I have a 15inch MBP running Boot Camp and XP. I am trying to use the "turn off monitor" setting in power options from the contol panel. However when the time is up it does not turn off the monitor...
Also when the "turn off monitor" feature is suppose to trigger, it disables my screensaver.
I don't want my computer to sleep, I just want to turn the monitor off. Right now I just dim the screen until it fades a little but I can still see my desktop screen so I know it is on.
Can anyone tell me how I can turn off the monitor?

Support are now quoting Apple's engineers as saying it is now "expected behaviour" under Lion for the MBP's internal display to reactivate upon opening the lid, even if you want to use only your external display. A new version of the clamshell mode-related knowledgebase article (replacing HT3131) is due shortly confirming this.
This is despite:
- the obvious temperature-related benefits that were achievable (under Snow Leopard) by opening your MBP lid whilst continuing to output solely to, say, a 27" cinema display
- the waste of energy and inefficient use of graphics processing power in needlessly running two active screens (ie if running your MBP in clamshell mode would otherwise make it too hot and/or noisy)
- the negative longer-term impact on the battery and other components from running the MBP any hotter than it needs to be.
If you would like to have the previous behaviour restored, please lobby Apple to change how Lion handles clamshell mode. Options available to them include changing Lion's expected behaviour or adding a user-selectable option within System Preferences.
Feedback can be submitted here:
http://www.apple.com/feedback/macosx.html

How do I turn off computer monitor when watching DVD movie on TV monitor?

I think this is really a Leopard question because it involves setting up 2 monitors in System Preferences within OSX. 1) I have a wide screen TV connected to my iMac (Intel White Late 2006) through the Mini-DVI port and a separate audio cable. This connection works fine. 2) The purpose of the TV screen is only to watch DVDs using the DVD player and iDVD in my iMac. 3) In System Preferences->Displays->Arrangement, both my computer monitor and the TV screen appear as separate monitors. I have the setting to mirror each other. With this setting, the DVD movie plays on both the iMac computer screen and on the TV screen. 4) FINALLY, MY QUESTION: When watching a DVD on the TV screen, I would like to turn off the monitor in my iMac so that the screen is dark (in sleep mode to save power, etc.); I want only the TV screen to display the movie. How do I turn off only the iMac screen? Thank you. Dale

Dale H. Eckerman Jr wrote:
I think this is really a Leopard question because it involves setting up 2 monitors in System Preferences within OSX. 1) I have a wide screen TV connected to my iMac (Intel White Late 2006) through the Mini-DVI port and a separate audio cable. This connection works fine. 2) The purpose of the TV screen is only to watch DVDs using the DVD player and iDVD in my iMac. 3) In System Preferences->Displays->Arrangement, both my computer monitor and the TV screen appear as separate monitors. I have the setting to mirror each other. With this setting, the DVD movie plays on both the iMac computer screen and on the TV screen. 4) FINALLY, MY QUESTION: When watching a DVD on the TV screen, I would like to turn off the monitor in my iMac so that the screen is dark (in sleep mode to save power, etc.); I want only the TV screen to display the movie. How do I turn off only the iMac screen?
That's impossible. It can only be done on a laptop but not on an iMac.

How do i turn off my monitor off while being displayed on a projector

how do i turn off my monitor off while being displayed on a projector

By reducing the brightness of your screen to zero.

Turning off internal monitor while using external one

Hello, Apple Support Communities.
Before OSX Lion, anyone could turn off internal monitor while using external one, by waking up computer with lid closed, and the internal monitor will be kept turned off. But now, -I wonder what made Apple to think this way- Lion will turn on the internal one back on.
I don't care about all sorts of reasons why should I or shouldn't I desire to this. I just want it, because I have nice big monitor, which is apparently bigger than my Macbook Pro. Besides using double monitor will just exhaust my poor laptop. -mine is bit old-
I found ridicoulus answer from community, saying I should try fridge magnet. Sorry, but I don't want risk my whole computer, especially my HDD from getting magnetic damage. It happened so many times, -thanks my little bro- so now I am sick of magnet. I don't think Apple will cover this AKA magnetic damage anyway. -It wouldn't just damage, just erase your HDD-
So.... Any helpful insights? Thanks.

Nevermind. I found solution. Though it cost me 24 bucks.
Now Apple is seriously making me to consider to roll back to sucking Windows.
Thanks Jobs!

When mirroring - can I turn off the monitor on my Mac...?

I just set up my MacBook Pro with my AppleTV and everything is working nicely. However, It would be even better if I could get my computer monitor to turn off while I'm viewing on my TV.
Is this possible?

Actually, the answer is YES!
Thought it best to post here again because I discovered that while Mirroring, turning off the monitor on my MacBook Pro is possible (despite a few replies here that it cannot be done). Its super easy to do, just dim the monitor until it goes completely dark, and continue to use your computer as it is displayed on the TV. The trick is not to close the monitor down, that will put the computer to sleep.
While I was hoping I could also achieve the same result while my MacBook is connected to my Cinema display, it seems the dimming capability on the Cinema display is limited to getting very dim, but not turning off completely.
I'll keep researching this some more and if I have any more updates I will post back to share -- hopefully there are other users who will find this info helpful.
For now, I will be using my TV as my primary display while my MacBook Pro's monitor is turned off.

Turn off a monitoring on CCMS (RZ21)

I want to turn off a monitoring on RZ21 but I could not find the right button -- no button to turn off at all.
Could you tell how? Thanks!

hi Christy Kelly,
Please follow these steps below:
- Logon to your system
- get into transaction RZ21
- Under 'Toplogy'; choose 'System Overview'
- Click on 'Display Overview'
- Click on 'Local Segments (&)
- Click on 'Edit/Change' button (pencil button)
- Change Segment status to 'OFFLINE' or 'SHUTDOWN'
- And 'save' the changes
Otherwise, if not all above....I would suggest one otheway that's "Please STOP the CCMS service from services.msc"
I hope these instructions will help you.
Regards
Sekhar

How to turn off the Monitor???

Hey friends!
Is it possible to turn the Monitor (Display Device) ON and OFF from a java application???
Thanks a lot!
Ricardo

Hi! This is completely Windows-specific, and I found it on a website, so I don't take credit for it. Hopefully you do know how to use JNI, so here's the C code you could try out (no I haven't tried it yet).
JNIEXPORT void JNICALL Java_JNative_turnOffMonitor (JNIEnv *env, jclass cls)
SendMessage (HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, 2);
}2 turns off the monitor, HWND_BROADCAST sends the message to all top-level windows, 1 sets the monitor to low power and -1 switches the monitor back on. Please use at own risk, and you'll probably want to have some more error handling in your code if you do plan to use it. You will need to include windows.h and user32.lib (unless you are dynamically linking) for the code to compile.
Hope it helps.
Cheers
P.S. Here's the website I found it in (note, the code's in Delphi, so I just took the API calls, and modified the first parameter to HWND_BROADCAST). http://chiragdalal.tripod.com/howto/monitor_on_off.html

How to turn off one monitor without disconnecting it

I have two monitors on the mini, one is 24 connected with mini-dvi to DVI and another is 19 connected with mini-displayport to VGA.
Most of the time, I only use the 24 one and don't need the 19 one. However, if I don't disconnect the cable, the Mac still think the 19 one is connected and I can move windows onto it. So I have to connect the cable when I need it and disconnect it after using, every time!
Is there a software way (such as a shortcut) to turn off a monitor without disconnecting the cable?

As gavinlufc said, sometimes it works to power off the monitor you don't want to use. But that doesn't always work because in many cases the Mac will detect the monitor as being present regardless of whether it is powered on or powered off.
Unfortunately, there is no other way to do what you desire short of unplugging, as you are already doing. This feature gets requested from time to time by others. You could file a request with Apple through the OS X feedback page.
http://www.apple.com/feedback/macosx.html
I just put in such a request. The more they get, the more they will consider making the change.

How can I turn off the monitor but not the computer on my touchsmart 310..

I leave my computer on at night to keep wireless network going, but I want to turn off just the monitor. All of the advice I've seen is to turn off the touchscreen feature -not the monitor itself. Thank you.

You can set the timing for the display to turn off.
Try this:
Click:
Start.
Control Panel.
Hardware and Sound.
Power Options.
On the left bar you'll find Choose when to turn off the display.
At Turn off the display: there is a drop dowm menu to choose the number of minutes before the display turns off. Make your selection.
Try that and see if it works for you.
I hope this is what you were looking for,
GeorgeFN
GeorgeFN
I work on behalf of HP.

Turning off 1 monitor causing problems?

first off i am trying to explain the situation as best as possible here so please ask if this doesnt make sense.
i have 2 LCD's hooked to the new Mini as such:
1 going mini display port to DVI adapter to DVI on 19" Monitor (standard monitor)
1 going mini DVI to DVI adapter to a DVI to HDMI on 52" LCD (Samsung TV)
i just sold me iMac and switched to the Mini not only to be able to hide the Mini which i couldn't do with the iMac but also when i watch a movie full screen on the 52 i was never able to turn off the iMac monitor and would have to cover it with a towel so that it was dark in the room except for the 52 showing the movie.
my thought was that with 2 monitors separately hooked up to the Mini that i could solve the turning off the second monitor problem as they would now both have power buttons. besides making it dark in the room i also like to have the monitor off and so that i can have Plex on the 52 always in full screen mode so my wife can just hit "Watch Plex" on the logitech remote and the TV and Stereo switch to the proper inputs and away she goes to watch whatever without having to touch the computer which when both monitors are on works perfectly.
Scenario:
i have the 19 setup with the Dock and menu bar and the 52 as an extended desktop. this allows me to keep EyeTV and Plex full screen and still have full functioning OS on the 19 regardless of whether we are watching something or not. this also allows me to remote desktop in which is what i usually do from the macbook on the couch and enjoy the fullscreen movie or whatever and setup downloads or what have you on the second monitor. hope that made sense.
Problems:
1. when the 19 is connected to the mini-DVI port and 52 to the mini-Display port and a movie is going on the 52 and i go to turn off the 19 which is where i keep my menu bar and dock i get a stuttering movie on the 52 and when i turn the 19 back on it goes away. this happens regardless of whether the movie is running in Plex, VLC, etc.. or even if i am watching EyeTV.
2. if i switch then around so that the 19 is on the mini-Display port and 52 on the mini-DVI port and turn off the 19 then i get the blue screen like you just plugged in a monitor and then i get my menu bar/dock on the 52 and loose the movie all together but still hear it. i have to reopen Plex or whatever to get it full screen on the 52 again but this negates my original plan to have the 19 with the dock/menu bar so that i can do other things while watching the 52 full screen as extended.
i appreciate anyone that took the time to read through this and could give me any possible solutions or idea on how to get this setup working the way i wanted it to.
thanks

it is an Acer X193W and does have a sleep / power saving feature but it is activated by the computer which i think would be a problem.
the manual for the monitor says:
"The monitor will be driven into Power Saving” mode by the control signal from the display controller, as indicated by the amber-color power LED. The power saving states will be kept until a control signal has been detected or the keyboard or mouse is activated. The recovery time from Active OFF state back to ON state is around 5 seconds."
not sure how i could activate that sleep mode without affecting the other monitor?
thanks

Selectively turn off second monitor

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