Video card doesn't always display upon starting Mac Pro 1,1

Discussion in 'Mac Pro' started by Joshua M, Mar 21, 2015.

  1. Joshua M macrumors newbie

    Joined:
    Mar 15, 2010
    #1
    I have a dual 3.0GHz Mac Pro 1,1 running Lion.

    The majority of the time I start or restart the machine, the video card simply does not send data to the monitor. The machine (including the video card fan) powers up and I know it's working fine because it will play sound from reopening Chrome tabs.

    However, the monitor won't come out of sleep. Thinking the monitor was wonky, I tried another monitor and it does the same thing. Next, I plugged in both monitors and it will often boot up and display my extended desktop onto the second monitor, but not my main desktop. I can move my mouse over to the second screen and see it's working. If I turn off the main monitor, it will put the blank screen onto the second monitor (as it became the main) and put it to sleep.

    It doesn't appear to matter if it's a hard reset (holding the front power button or unplugging the cable) from cold or warm. I've both left it cold for days before trying it as well as trying it over and over. I've cleared the PRAM and all those various finger salutes. I've blown dust out of the machine, I've physically removed the card to blow dust out, I've even removed all but one pair of memory.

    Every once in a while, it will boot up just fine the first try. Or, after a dozen power cycles, I get lucky and it boots properly. Luckily, it's solid for months on end, otherwise I'd be driven more crazy than I am.

    I purchased the machine as a refurb, so though it does have the dreaded X1900XT, it was not covered in the recall (too new, IIRC) and this issue doesn't seem to be what people were experiencing. It's never glitchy or shows weird colors. When it chooses to display, it displays perfectly.

    How can I test to see if it's the video card without purchasing a $150 card that's half the value of the machine over at Macvidcards? What should I try first?
     
  2. MacVidCards Suspended

    Joined:
    Nov 17, 2008
    Location:
    Hollywood, CA
    #2
    thats standard failure on X1900

    clear the dust out of fan, that's all you can do
     
  3. IowaLynn macrumors 6502a

    IowaLynn

    Joined:
    Feb 22, 2015
    #3
    And keep system fans at 900+ rpm which can hel FBDIMMs as well if they get warm (68˚C or above) New FBDIMMs run at 59˚
     
  4. Joshua M thread starter macrumors newbie

    Joined:
    Mar 15, 2010
    #4
    Thanks guys! It actually happens even when the machine is cold, for example, it was off since the 22nd and I just tried to turn it on last night. Computer works, video card doesn't. I did blow out every nook and cranny before my experimentation on the night I posted here.

    MacVidCards: Is that "standard failure" in your experience with flashing video cards for your business? It wasn't the issue people were having that eventually ended in the 1900XT replacement program. People were getting glitchy video, not literally "no power" to the main monitor. It's not even the DVI1 port, I could switch them back and forth.
     

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