Late 2009 iMac 21.5" mini display problem

Discussion in 'iMac' started by Niklaasuk, Apr 20, 2012.

  1. Niklaasuk macrumors newbie

    Joined:
    Apr 20, 2012
    #1
    I have tried three different mini display to vga adaptors and cannot get the mac to detect the displays at the other end, (of which I have tried two)

    The vga cable (tried also with two different ones) works, as have connected to a pc and no problem, plus the power buttons on the monitors show up blue when on and amber when asleep, the vga cable when attached stays blue, but the moment the adaptor is attached, the button(s) turn amber

    I have PRAM reset & SMC reset, all to no avail

    How can I check if the mini display is functioning, as all I can find in 'ABOUT THIS MAC', is Thunderbolt - No Hardware Found, which is what I would have expected, but nothing obvious regarding Mini Display

    Any ideas please?:confused:
     
  2. Ubuntu macrumors 68000

    Ubuntu

    Joined:
    Jul 3, 2005
    Location:
    UK/US
    #2
    What happens when you press Detect Displays in the Displays preferences?
     
  3. Niklaasuk thread starter macrumors newbie

    Joined:
    Apr 20, 2012
    #3
    Late 2009 iMac 21.5" mini display problem

    Absolutely nothing

    I have also attempted a firmware upgrade with the cables attached and the message 'No mini display to vga adapter found' shows up, I have tried this with the vga cable attached at both ends and wit the adapter only
     

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