Mac Pro 1.1 boots up but blank screen

Discussion in 'Mac Pro' started by dvfd9, Apr 16, 2012.

  1. dvfd9 macrumors newbie

    Apr 16, 2012
    Have a Mac Pro 1.1 with the 2.66 dual core cpu, and 4GB memory running OSX Lion.

    If I use an unsupported video card - 8800GT 2nd gen on my 1st gen mac pro. Would I get a black screen??

    tested the video card on a PC and it displays fine.

    On the Mac Pro I can hear it boot into OSX and everything just no video output.

    Not familiar with how the EFI works and why I get no video. Hopefully its just the wrong card ordered and not the logic board. Diag_LED Displays POWER ON, GPU DETECTED and Trickle Light is on, nothing else. which is also normal.
  2. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
    use the 10.7.3 drivers or ATY_Init and then you can flash card with correct EFI

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