Can't boot from 10.5.6 install disk

Discussion in 'Mac Pro' started by bad2pay, Feb 23, 2009.

  1. bad2pay macrumors newbie

    Feb 23, 2009
    First timer here. I bought a used G4 MDD 1.25 dual FW800 recently. Was pre-loaded with 10.5.6. I thought that I would add a hard drive. After attempting to format, it rebooted to a gray screen with a MacMonitor icon. If I hit "option", I can get it to progress to a blue screen w/ padlock asking for a password. I only remember setting a user password. I believe this is asking for an admin password.
    So, I thought that I'd get the 10.5.6 Install disk to reset the password. I can't seem to boot from the Install disk! I've tried holding down the "c" key at startup, (also the "option" key). No avail. Completely frustrated!!!
  2. grue macrumors 65816

    Nov 14, 2003
    Open Firmware password. Pull one of the RAM chips and zap the PRAM
  3. bad2pay thread starter macrumors newbie

    Feb 23, 2009
    thanks for the reply.

    I am at Open Firmware. I typed "reset-nvram", then it asks for a password, which I don't have. What now?
  4. NoNameBrand macrumors 6502

    Nov 17, 2005
    Halifax, Canada

    Grue almost had it - you need to zap the PRAM three times, apparently:

  5. bad2pay thread starter macrumors newbie

    Feb 23, 2009
    Fanfriggintastic. Back in business.

    First rate, thanks guys.

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