iMac freezes when connecting external Monitor

Discussion in 'iMac' started by bairdc3, Apr 7, 2008.

  1. bairdc3 macrumors newbie

    Joined:
    Oct 28, 2007
    #1
    I have a newer iMac 24" bought in 11/2007. I have the mini-dvi to vga converter and when I connect it to a external tv capable of 1024x768, the iMac freezes and does nothing. I disconnect and the screen turns blue and the flickers back on and everything works. I have made the connection then booted up, and I have tried every resolution all the way down to 640x480, same thing it just locks up the screen, but again as soon as I unplug the mini-dvi to vga cable from the iMac it flicks to a blue screen and everything comes back. I have reviewed dmesg nothing, and revieiw /var/log/messages. Is there any troubleshooting I can do. I am old school unix/linux guy just converted my family to Apple and would like to use the display on my tv to watch my iTunes movies.
     
  2. flyinthesky macrumors newbie

    Joined:
    Apr 7, 2008
    #2
    Maybe you can try it at another monitor
     
  3. bairdc3 thread starter macrumors newbie

    Joined:
    Oct 28, 2007
    #3
    Last night I connected another external monitor and it worked fine. I also connected the TV to a Linux box and it worked fine. So I am not sure what could be happening with when I connect the TV into the iMac? Are there any other logs in the OS that could show anything?
     
  4. rajid macrumors member

    Joined:
    Jun 8, 2007
    #4
    My new Macbook Pro does this

    My new Macbook Pro does this about 50% of the time. I finally found that closing the lid, thus putting it to sleep, then connecting the external monitor and keyboard, which wakes it back up automatically, works. Unfortunately, I really wanted both screens at once. :(
     

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