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Thread: No video Mac mini

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  1. #1
    Join Date
    Sep 2008
    Posts
    152

    Default No video Mac mini

    Older Mac mini G4..... re-installing OSX 10.5. In the middle of install monitor went to sleep but won't wake back up. I waited forever for it to maybe complete the install.... monitor still off. Rebooted machine- same thing. Ejected disc and rebooted- same thing. Tested monitor , it's just fine...

    Anyone ?

  2. #2
    Join Date
    Mar 2001
    Location
    Virginia... where one Democrat CAN make a difference
    Posts
    2,929

    Default

    zap the PRAM or NVRAM if it is an open firmware mac
    Damien,

  3. #3
    Join Date
    Sep 2008
    Posts
    152

    Default

    How do I know if it's an open firmware mac and how do you zap the NVRAM ?

  4. #4
    Join Date
    Mar 2001
    Location
    Virginia... where one Democrat CAN make a difference
    Posts
    2,929

    Default

    Zap the PRAM. On Startup hold the (command + option + P + R) keys. Hold them until you hear the first startup "bong/chime" and keep holding them for about 3 more "bongs/chimes". (4 total chimes)

    Open Firmware reset -

    Hold the Command+Option+O+F keys during startup. This will put you in the Open Firmware Interface. At the end of any text you will get a '>' prompt. At that prompt type:

    reset-nvram -Hit Return
    set-defaults -Hit Return
    reset-all -Hit Return


    Command+Option+O+F will do nothing if your mac is NOT an open firmware machine
    Damien,

  5. #5
    Join Date
    Sep 2008
    Posts
    152

    Default

    thank you !!

  6. #6
    Join Date
    Sep 2008
    Posts
    152

    Default

    When I try to zap the ram, it will beeeeeeep once... I keep holding and it will only start up chime once...

    Am I not holding down long enough ) I held for a minute) or am I doing something else wrong?

    also, nothing happens when I try to zap the NVRAM for the firmware reset !

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