Mac pro 2009 won't start up

Discussion in 'Mac Pro' started by c1830, Apr 24, 2016.

  1. c1830 macrumors newbie

    c1830

    Joined:
    Apr 24, 2016
    #1
    Hey, everyone.

    I got a problem that my mac pro 2009 doesn't start up.

    Yesterday, I use it but it shutdown suddenly.

    Then I press the start button again and it boot about 15 sec then shutdown.

    After this, I can't start up anymore when I press the start button.

    I try to check anything following this http://tim.id.au/laptops/apple/macpro/ma...

    When I plug the power cord, the OVTMP CPUA and OVTMP CPUB LEDs flash red.

    Press the DIAG button, the 5V STBY LED illuminates

    Disconnect the front panel board and momentarily jump the SYS_PWR, no any response.

    Reduce computer to minimal configuration, 5V STBY LED illuminates.

    But I still don't know which part broken.

    Can anyone help me or tell me which part I can check?

    Whether the OVTMP CPU A, B LEDs, and 5V STBY LED illuminating means the power supply and backplane board is ok?

    Thanks a lot.
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    You mean nothing from the PSU? No fan, nothing, and no "click" sound from PSU, just like dead? (Except that few LED)
     
  3. c1830 thread starter macrumors newbie

    c1830

    Joined:
    Apr 24, 2016
    #3
    Yes, nothing at all.
     
  4. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    So, the main suspects are still the PSU or backplane board.

    Even the 5V STBY LED illuminates, it's not necessary means that your PSU or the backplane board is fulling functioning.

    And without another 4,1 or PSU, it's hard to test what's wrong.
     

Share This Page