Cannot Startup after attempting to install unsuported windows, Please Help

Discussion in 'macOS' started by Fatjim, Jan 18, 2008.

  1. Fatjim macrumors newbie

    Jan 17, 2008
    I have an IMAC 20 CORE 2 DUO 2.0GHZ 1GB 250GB DVDR HD2400XT 128MB
    It was running on leopard

    I recently tried to install an unsupported version of Windows installer via Boot Camp. Now when I switch the machine on there is just a blank white screen.

    The mac won’t boot from the hard drive, or from the installation disk. I have tried booting with all the recommended boot key combinations, zapped the PRAM, and VRAM. I have
    tried running the firmware restoration disc. Nothing gets a response. The mac won’t open firmware on start up.

    The only things that get anything other than a blank white screen are

    If I press X on start up I get a black screen with a white dash on it.
    (I cannot type anything)

    And most strange I have a backup copy of the operating system on a DVD
    which was not burnt as an image copy DVD but burnt from the opened
    programme. If I put this in and press option on start up a disc
    appears with the instruction to EFI boot. When I try to EFI boot with
    the disc in the apple appears and the cog showing its trying to boot
    up but it doesn’t boot. This only happens with this copy not with the
    original disk.

    I was considering opening it up and removing the battery, hoping to
    restore everything to factory settings, but this is not straight

    I have been on the apple web page which does cover this issue, but recommends going to a service provider. I have been quoted £150 to fix it.

    Any advice on how I can sort this myself would be much appreciated
  2. psonice macrumors 6502a

    Jul 22, 2005
    If you used an xp service pack 1 (or before) disk, it screws up the disk so neither windows or osx can work. You should be able to boot from the original tiger or leopard dvd though, and reinstall. I know because I did the same thing, and it wouldn't boot at all like yours, but would boot from the dvd.

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