Mac Pro 08 - Black screen (only in windows!)

Discussion in 'Mac Pro' started by Soulplayer, Apr 14, 2012.

  1. Soulplayer, Apr 14, 2012
    Last edited: Apr 14, 2012

    Soulplayer macrumors newbie

    Mar 3, 2010
    Hy everyone,

    I have a really strange problem. Yesterday I was gaming bf3 when all of a sudden my computer screen turned black. I pressed reboot but it happened again.

    I tried resetting the SMC memory and holding command alt + P&R and my mac pro jumped back to mac with the screen on. So if I boot in mac everything is fine.

    Now comes the weird part: every time I try to boot in windows, my screens turn black. I tried reinstalling lion, reinstalling windows and so forth. I always see "loading drivers" and sometimes even the start of the installation but after a while my screens turn black.

    I have an ATI Radeon HD 5870 from apple in my system. Is it possible something in the bootloader for windows could have gone wrong? I mean I don't know a lot about boots and so forth, but this sounds like an EFI problem or something?

    I hope someone can help cause this really sucks.


    Edit: information from rEFIt:

    *** Report for internal hard disk ***

    Current GPT partition table:
    # Start LBA End LBA Type
    1 40 409639 EFI System (FAT)
    2 409640 975503591 Mac OS X HFS+
    3 975503592 976773127 Mac OS X Boot

    Current MBR partition table:
    # A Start LBA End LBA Type
    1 1 976773167 ee EFI Protective

    MBR contents:
    Boot Code: None

    Partition at LBA 40:
    Boot Code: None (Non-system disk message)
    File System: FAT32
    Listed in GPT as partition 1, type EFI System (FAT)

    Partition at LBA 409640:
    Boot Code: None
    File System: HFS Extended (HFS+)
    Listed in GPT as partition 2, type Mac OS X HFS+

    Partition at LBA 975503592:
    Boot Code: None
    File System: HFS Extended (HFS+)
    Listed in GPT as partition 3, type Mac OS X Boot
  2. Draeconis macrumors 6502a

    May 6, 2008
    I'm having exactly the same problem. I have a 5,1 running 10.7.4, and I used to be able to get into the installation options, but now I only get as far as 'loading files' and my screen goes black. Doesn't matter if I use EFI boot or normal boot, the screen just goes black. Any ideas chaps?
  3. Draeconis macrumors 6502a

    May 6, 2008
    Thought I'd update this thread when I'd figured my issue out in the hopes the OP and others may benefit from it.

    After much rebooting and PRAM resetting, error messages galore about Windows not being able to install in this drive partition and many other things, I eventually got Windows to tell me one interesting thing;

    'Your computer hardware does not support booting from this drive'.

    The hard drive I was trying to install Windows on was in Bay 4. Took Bay 4 and 1 out and swapped them over; Windows installed perfectly.

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