Mac Pro 3.1 Booting Problem

Discussion in 'Mac Pro' started by snaper, Jun 30, 2016.

  1. snaper macrumors newbie

    Joined:
    Jun 30, 2016
    #1
    Hi Guys,

    I just signed in, because I have a big trouble with my machine, and it seems, no professionals could help me.

    Around a month ago, my machine started act weirdly : shutting down, instead of go to sleep mode.
    A few days later, it did not want to start, so I sent it a service centre. They sad, a few days later, no problem with the machine at all, and sent it back to me.

    Actually, there was really no problem with it for around a week, then, again, won't start.

    This morning, I've plugged it off the wall, and left.
    After I've got home from the work, tried it, and now, it works.

    I've checked the diagnostic LEDs during a failed boot, and everything seems normal, then **** down, then the OTA and OTB LEDs lights up for a second and thats all.

    I think it is a PS problem, but before I'm gonna sped 200 EUR for a new PSU, I would like to be sure...

    Have any of you every experienced the same?
     
  2. strukt macrumors member

    strukt

    Joined:
    Aug 8, 2012
    Location:
    Norway
    #2
    Intermittent problems can be difficult to troubleshoot.

    I would maybe remove all RAM sticks except one, and run the computer for a while to see if the behaviour changes.

    If that doesn't work. Reinstall the system without transferring the backup. See if a clean system helps.

    Remove some hard drives if you have more of them.

    Remove extra PCI cards.

    Etc..

    Good luck.
     
  3. snaper thread starter macrumors newbie

    Joined:
    Jun 30, 2016
    #3
    Hi Strukt,

    Did everything you mentioned. Tried to start without RAM, GPU, HDDs, nothing.
    SMC reset, no luck...
    After 8-10 hours unplugged, its OK now, but now, I'm afraid to turn it off :D

    Still suspicious about the PSU :S
    --- Post Merged, Jun 30, 2016 ---
    Oh, forgot to mention, that there is no startup chime since it came back from the service centre...
     

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