How can I get my iMac to be the primary screen again?

Hi everyone!!
A couple days ago I was watching a movie on my tv, which is my ''external monitor" for my iMac. I used VLC and it was full screen on my tv, I never had any problems with it. After the movie ended, I couldn't get my iMac screen to work. I restarted, and it flashes a white screen and it does make the apple startup sound. Also everything seems to be working just fine. When I hook it up to my TV, I can use my tv as the ''main monitor" but my iMacs screen remains black. (I have it in mirroring mode now) When I restart by pressing the on and off switch, I do get a flash of my current screen, but it fades to black quite soon after. Even if I wake my iMac up, it shows me the log in screen for about half a secodn and also fades to black. So it's not the screen itself that has any issues.
I think I accidentally clicked something in the display settings, but I have no idea how I can get my iMacs screen to work again. Does anybody know how to get my iMac back to functioning as a primary monitor? When I unplug the thunderbolt cable, it doesn't switch back either.
I already tried dragging the apple top bar from one screen to another, but it doesn't work. When I reset the PRAM, it does restart, but right after I hear the second chime the screen still remains black and it boots like it did before, still no functioning iMac screen.
Thanks in advance!

The screen is all black, so it's not the backlight. It's weird because when I get the computer off of sleep mode, it shows the log in screen really quickly. So my LCD isn't broken either. It just switches back to the wrong resolution I guess. Which makes the screen black again.

Similar Messages

  • How can I get my IMac to recognise the scanner part of the HP printer/scanner?  It prints!

    How can I get my iMac to recognise the scanner part of the HP printer/scanner?  It prints!@

    I had a similar problem right after the first update to 10.6.7, which happened to quite a few people.  It took a couple of software updates and then an HP printer update to fix it.  So make sure that all your software updates are up to date.   Mine is an older printer: C6280 All-in-one but scans fine now that my mac recoginises it.  You might want to check on the HP site also.
    It was really frustrating because it had worked fine before.
    laverne's mom
    Message was edited by: laverne's mom

  • How can i get my ipod toout of the white screen

    how can i get my ipod off the white screen

    Try:
    - iOS: Not responding or does not turn on
    - Also try DFU mode after try recovery mode
    How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
    - If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
    - Try on another computer                            
    - If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
      Apple Retail Store - Genius Bar                              

  • Since upgrade to 3.6.7 the emoticons window on a forum I use always opens full screen, not as a small window. How can I get it to open as a small screen again.

    Since upgrading to 3.6.7, when I go to a forum I'm active on and click the emoticons icon in the reply box, the emoticons window opens full screen, and not as a small screen like it did before. I can click on the box to make it small again, but next time I open it, it's back to full screen. Ok, not a major problem, but really rather annoying. I've tried to find a way to get it back to opening the way it did before, but to no avail. Does anyone know how I can solve this little problem?
    == I upgraded to 3.6.7

    No-one got any ideas on this then? It's definitely a firefox problem, as when I open the forum page (mentioned in the OP) with Opera or Chrome, the emoticons window opens as a small window, same as FF used to before the upgrade.

  • I lost my connection with my AirPort Base Station when I upgraded to the OS Maverick.  How can I get my system to recognize the base station again?

    I lost my connection with my AirPort Base Station when I upgraded to the OS Maverick.  I can still see the Internet, but the Time Machine cannot backup now because it cannot locate the AirPort base station.  How can I resolve this issue?
    Steps already taken with zero success:
    1. Restarted the AirPort Base Station multiple times.
    2. Restarted the Mac Pro multiple times.
    3. Looked online for AirPort update for 6.3.2 version.
    Other Apple products in my house can still see the AirPort Base Station, however my Mac Pro and Mac Book Pro cannot.
    Please advise.

    That information helps. If you want to use one of the SmartStor's disks as a repository for sharing your iTunes Library, then do not configure that disk as a RAID. Format it with Disk Utility using the Erase tab. Mac OS Extended (Journaled) is the correct choice.
    Connect it to your Time Capsule, then use AirPort Utility to configure access requirements for sharing it on your network. It should appear as a shared volume in the Finder, available to all your Macs as you thought it should.
    I also thought maybe the extra HD space would be added to the existing Airport Disk.  It isn't.
    Correct. There is no way to do that. The only way to increase the capacity of a Time Capsule's hard disk is to replace the Time Capsule (or its disk, if you are amenable to disassembling it) with a larger capacity model.
    If you also want to use the SmartStor as a RAID, that is another story, and you should probably attack that problem separately.

  • How can i get Firefox to show on the whole screen/ it just uses the middle of the screen and not the whole screen Thank you

    Certain web sites only use the middle of the monitor screen and do not show all their content on the right

    You can use one of these extensions to adjust the default font size and page zoom on web pages:
    * Default FullZoom Level - https://addons.mozilla.org/firefox/addon/6965
    * NoSquint - https://addons.mozilla.org/firefox/addon/2592

  • How can i get my imac to recognize the mx870 scanner

    I originally was using the Canon MX870 via Bonjour to print and scan. Last night, imac would not recognize the scanner. After I deleted the device and tried to reinstall, the system preferences are not giving me an option as having a scanner.

    i was able to speak to an apple customer service personnel and was advised to use the MP Navigator to print and scan.  It worked.

  • HOW CAN I GET FIREFOX TO OPEN TO THE FIREFOX SCREEN WHEN I CLICK ON THE ICON WITHOUT HAVING TO ENTER MY NAME AND PASSWORD EACH TIME ON MY MAC.

    CLEAR ABOVE

    Third item in the table marked identified with <url>
    * Command line arguments - MozillaZine Knowledge Base<br>http://kb.mozillazine.org/Command_line_arguments
    which is essentially the same as if you just change your home page
    * How to set the home page | How to | Firefox Help<br>https://support.mozilla.com/kb/How%20to%20set%20the%20home%20page
    You might want to consider using a simpler home page, ideally one that is on your local drive, so you know Firefox is working even if you don't have a connection.
    But your choice is much better than choosing a home page that just interfaces with a search site, when there is a builtin toolbar that can bring up any search that you care to add an engine for.

  • How can i get my imac proceed to home page from restarting endlessly?  it will start then start booting then chime then bck to step one, not even hitting the start up page.... plssss help!

    how can i get my imac proceed to home page from restarting endlessly?  it will start then start booting then chime then bck to step one, not even hitting the start up page.... plssss help!

    Hi
    My Powerbook was the same. Only fix is to reinstall OSX from the install CD but be sure not to pick the Format and install clean. Once you boot with the install CD pick the preserve user data and settings.
    On My machine the reinstall looked perfect. My network, email, files and all the programmes were all there. Most apps worked fine but Adobe CS2, Virtual PC and NetBarrier all needed reinastallation as they reported a few files or registration was missing. I went for the 10.4.3 upgrade again and it worked fine.
    Good luck
    D

  • How can I get my iMac to work with scanners?

    How can I get my iMac to work with scanners? The scanners scan just fine, but not to my iMac. I've tried Epson and HP all-in-ones; it makes no diffference. I'm becoming extremely displeased, but don't know at whom I should be displeased, the printer guys or Apple. Help?

    My Epson is able to do scans using Image Capture without any problems at all.
    Allan

  • How can I get speaker volume contol in the toolbar on my iMac ?

    How can I get speaker volume contol in the toolbar on my iMac ?

    System Preferences - Sound - Click the box in the graphic below:

  • How can I get my imac to get valid ip numbers?

    how can I get my imac to get valid ip numbers?

    Try renewing you DHCP Lease, click on your system preferences and then click network.  Select your ethernet connect on the left then click the advance button, when the windows opens make sure the TCP/IP tab is selected then click the Renew DHCP Lease, wait a few minutes and then check your IP address.  Also check you DNS by clicking on the DNS tab and taking a look at you DNS servers then should be the same as you other computers. 

  • How can I get my iMac to show videos, such as those on YouTube, again?

    How can I get my iMac to show videos, such as those on YouTubes, email, AOL, and others, again.

    OK. What happens when you try?
    Have you updated your Flash to the latest video? Worth trying again, just in case you haven't.
    http://get.adobe.com/flashplayer/
    Click Install Now, download, and run the installer from your Downloads folder. Make sure you install it all the way (it'll ask you to quit Safari). Then re-launch Safari and try the video sites again. If that doesn't work, download and run Firefox, and try there - let us know if one browser works and one doesn't.
    Matt

  • How can I get my iMAC (10.7 Lion) to display all users at start-up?

    How can I get my iMac ( 10.7 Lion ) to display all users icons at startup/login?

    Hi..
    Open System Preferences > Users & Groups
    Click the gold padlock icon to make changes. You may be prompted for your admin password.
    Now select:  List of users next to:  Display login window as
    Select Off from the pop up menu next to: Automatic login
    edited by:  cs

  • How can I get my iMac screen to divide into sections? I'm using OS X 9.2. Thanks.

    How can I get my iMac screen to divide into sections? I'm using Maverick OS X 9.2. Thanks.

    You cannot split a monitor up into sections in Mac OS X.
    You can have separate monitor spaces or desktops that you can access using the Spaces or Mission Control functionality in OS X Mavericks.
    You cannot split monitor views into seperate sections
    There is no such way to do this in Mac OS X.
    Do a search for an app called Cinch OR another app called A Better Snap Tool. Both of these apps are in the Mac App Store.
    These may work for you.
    http://www.irradiatedsoftware.com/cinch/

Maybe you are looking for

  • Can't Get Manual Recording To Work

    I have been unable to get manual recording to work and thought this was something to do with having dual monitors.  I have now disabled my second monitor, and it is still not working for me. It's possible that I have done something wrong or have misu

  • Link to download extension "Remove Workspaces and Projects" is broken

    Hi all, I tried to install the extension "Remove Workspaces and Projects" version 1.1 but the downloaded zip archive was corrupt. So, I checked the link listed at http://www.oracle.com/technology/products/jdev/101/update/exchange.xml#serafeimk.jdev.e

  • FIFO Valuation Report

    Hi All, as an example, through Goods Receipt Purchase Order (e.g item 'x' quantity 10 price 2 euros =20 euros). If finally I get from vendor a Purchase invoice (copy from) with  item 'x' quantity 10 price 1 euros =10 euros I should expect to see that

  • SIP load balancing issue with ACE 4710

    SIP Load balancing Issue with ACE 4710 I have a Cisco ace 4710 with vesion Version A4(2.2). i configued simple SIP load balancing first without stickiness. without stikeiness we are having a problem because bye packet at the was not going to the same

  • Could not create virtual machine in virt-manager with kvm

    I installed the following packages: libvirt 0.6.1-1 (modified PKGBUILD from AUR) kvm 84-1 qemu 0.10.0-1 virtinst 0.400.3-1 (modified PKGBUILD from AUR) virtviewer 0.0.3-2 virt-manager 0.7.0-1(modified PKGBUILD from AUR) And my current user belongs to