Screen turns purple/green/red

I use a mac mini and when I logged on (Turned my computer on) I realized I have this purple taint (Tint? Whatever it is) and this is not normal. I have no clue what to do, I didnt change any settings before I turned it off. PLEASE HELP!
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  1. Restart the laptop, if this still does not work check your video driver settings for anything that may be causing this.


    If you still can't find anything try updating your video drivers.

    This also may be caused by the GPU failing, if that is the case there is very little you can do about fixing this.
  2. Check the video cable, sounds like something has come lose.
  3. warhead0 said:
    Restart the laptop, if this still does not work check your video driver settings for anything that may be causing this.


    If you still can't find anything try updating your video drivers.

    This also may be caused by the GPU failing, if that is the case there is very little you can do about fixing this.

    As a long-time OS X user, could you elaborate on how you update the video driver (other than updating the OS)?
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