Replacing PSU in 2009 Mac Pro?

Discussion in 'Mac Pro' started by Bafflefish, Apr 17, 2017.

  1. Bafflefish macrumors 6502

    Joined:
    Oct 16, 2009
    #1
    To briefly summarize: I was watching video on my 2009 Mac Pro (4.1 flashed to 5.1, with a X5690 installed) and all of a sudden I heard a loud pop. Unfortunately I don't know if it came from what component but it sounded as if a capacitor had blown.

    I didn't notice any issues with my speakers, the Mac Pro, or the monitor I was using, but I shut both the speakers and Mac Pro down out of precaution.

    I popped open the side of the Mac Pro and didn't see any blown capacitors on the motherboard or on the components I could see, but since I can't really see inside the PSU, I can't rule that out. I also haven't tried opening up my speaker system subwoofer yet to see if that's where it occurred.

    My question currently is, what's the possibility it was a capacitor in the PSU that went, and do I try to keep using it and see if it fails? My fear is that if it goes out it'll take various components with it.

    The other question I have is that I'm prepared to buy a replacement PSU off of DV Warehouse once I can figure out which of the two models they show is the correct one (https://www.dvwarehouse.com/661-501...-Pro-Early-2009-614-0435-----NEW-p-36243.html or https://www.dvwarehouse.com/661-544...0W-for-Mac-Pro-2009---2012---NEW-p-37683.html), but I've read before that with a PSU replacement I'd need to use the system disks to reset the fan profiles. I don't have those disks since I bought the Mac Pro second hand as a bit of a fun hobby to modernize it, and so I wouldn't be able to reset the fan profiles if I had to. Are the disks needed?

    Thanks!
     
  2. Filin Contributor

    Filin

    Joined:
    Mar 7, 2010
    Location:
    Ukraine
    #2
    I think "SMC Reset" procedure is enough
     
  3. rogerdee123 macrumors newbie

    Joined:
    May 28, 2008
    #3
    If it turns out to be your PSU, when you remove your bad PSU you can see the Apple part number etc on the old PSU and you can order a PSU with that part number.
     
  4. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #4
    FWIW, when I heard a loud pop from a CRT's power supply I opened it up and it was quite obvious. A bridge rectifier had blown in half. Snipped it off and soldered a new one in. Just cost a few bucks.
     

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