Mac Pro 1.1 wont boot up 2 solid red lights

Discussion in 'Mac Pro' started by Jedigav, Aug 29, 2015.

  1. Jedigav macrumors newbie

    Jedigav

    Joined:
    Jul 20, 2015
    #1
    I’ve checked through all of the RAM and it’s all good. The diagnostic LEDs on the logic board indicating failure or overheating of both CPUs A & B are solid red lights. The trickle voltage is there (amber indicator).

    The issue manifests by complete failure to boot up - no startup chime sound although the fans start up and the power indicator lights up solid. Also no power to any USB ports so can’t even use key shortcuts to attempt other boot modes.

    Has anybody had this do I need to replace the processors ? Do want to buy to find it wasn't them ?
     
  2. bax2003 macrumors 6502a

    bax2003

    Joined:
    Dec 25, 2011
    Location:
    Belgrade, Serbia
    #2
    CPUs are not the problem.
    Problem is
    1 - PSU (most probably) or
    2 - Logicboard
     
  3. Jedigav thread starter macrumors newbie

    Jedigav

    Joined:
    Jul 20, 2015
    #3

    Is there any way of checking the psu before I buy one ? Does it have to be a genuine apple or can u get aftermarket to work ?
     
  4. bax2003 macrumors 6502a

    bax2003

    Joined:
    Dec 25, 2011
    Location:
    Belgrade, Serbia
    #4
    It has to be Apple one because of different motherboard connectors and pinouts. Only way to test PSU is to put it in another Mac Pro and test it. I don´t know is there any way to turn on Mac Pro´s PSU without logic board.

    Which LED light when you press LED DIAG button on your logic board ?
     

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