No Chime On MacPro 2009 upgraded to 5.1

Discussion in 'Mac Pro' started by tarafran, Sep 22, 2017.

  1. tarafran, Sep 22, 2017
    Last edited: Sep 22, 2017

    tarafran macrumors newbie

    Joined:
    Mar 6, 2008
    Location:
    Key West
    #1
    Hi after the hurricane in Key West I unpacked my mac that has been tucked in a safe place for a week
    The mac powers up but i can't get to the chimes

    I went thru the service manual up to the step of checking it with only one CPU and one stick of memory but still no chime


    The Mac as been updated a few years back to 5.1

    did i loose the firmware update if the battery died ?
    i changed the battery before testing as the one inside only showed 2.3 volt

    My spec (Digital Audio Recording )
    dual 3.46 Xeon 64 gig ram ,GTX 1080 ,1 HD on 1TB for system,1 Avid HDX card


    I could use a good tech in the south Florida region if you know of one
    Thanks
    Francois
     
  2. Erdbeertorte Suspended

    Joined:
    May 20, 2015
    #2
    NVRAM reset tried? (cmd+option[alt]+P+R directly after turning on)
     
  3. tarafran thread starter macrumors newbie

    Joined:
    Mar 6, 2008
    Location:
    Key West
    #3
    yes no go thanks
     
  4. ActionableMango macrumors G3

    ActionableMango

    Joined:
    Sep 21, 2010
    #4
    Maybe when moving around, something popped out. I'd pull out and reseat all the drives, cards, etc.

    If you have the service manual there are instructions for telling you about the diagnostic LED indicators. Have you gone through those steps yet?
     
  5. tarafran thread starter macrumors newbie

    Joined:
    Mar 6, 2008
    Location:
    Key West
    #5
    Yes
    Everything is good with the Led till i get to the step with one processor and one stick of memory
    the chime is not sounding
     
  6. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
  7. flowrider macrumors 603

    flowrider

    Joined:
    Nov 23, 2012
    #7
    ^^^^The OP said flashed, but what difference does that make?

    Lou
     
  8. h9826790, Sep 22, 2017
    Last edited: Sep 23, 2017

    h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #8
    Oh, thanks Flowrider, I completely miss that. (That’s actually in the title, silly me)

    I am thinking for a dual processor flashed 5,1, if that’s upgraded with lidded CPU, and then move around. The chances of damaging the socket is greatly increased.
     
  9. tarafran thread starter macrumors newbie

    Joined:
    Mar 6, 2008
    Location:
    Key West
    #9
    It's flashed ,I removed the 2 cpu , cleaned ,reseated and pasted them
     
  10. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #10
    Are the CPU delidded? Did you check if the sockets are damaged?
     
  11. tarafran thread starter macrumors newbie

    Joined:
    Mar 6, 2008
    Location:
    Key West
    #11
    yes they are ,there is little bit of corrosion on the corner copper plate of the B cpu but not directly on the the cpu
     
  12. Bubalight macrumors member

    Joined:
    Apr 22, 2015
    #12
    There is law of physics that the sum of all the forces acting on an object at rest is zero.
    When properly assembled the screws/posts pull the heat sink down, but when the mac pro is moved, or on it's side, they can also can push up to balance the forces, and keep the force of the processor against the pins at a constant appropriate value.


    This is a 2 dimensional representation of the heatsink and screws on a processor tray, The numbers are representations, 20u represents the proper force of the pins pushing against the processor when it is correctly installed. The weight of the processor and the force of the screws counteract this to make for a balanced system. (The sum of all the forces = zero)
    Code:
           Weight of heatsink 60 Down
    NUT        |        Heatsink     |          NUT
    30d        20u 20u 20u 20u 20u 20u          30d 
    BOLT       |          Pins       |          BOLT
    
           Weight of heatsink 60 Left
    NUT        |        Heatsink     |          NUT
    100u       20u 20u 20u 20u 20u 20u          220d
    BOLT       |          Pins       |          BOLT
    
    When you use a lidded processor without washers, or with imperfect washers, then the bolts are not capable of pushing up to balance the rotational force of the heat sink, and the processor takes extra force instead. This is bad. It could be what broke your tray.
    Code:
           Weight of heatsink 60 Left
    NUT        |        Heatsink     |          NUT
    30d        60u 55u 50u 45u 40u 35u          255d
    BOLT       |          Pins       |          BOLT
    

     
  13. tarafran thread starter macrumors newbie

    Joined:
    Mar 6, 2008
    Location:
    Key West
    #13
    Looks like it.
    The computer was in my ISO rack on it side .
    I took it out before the Hurricane came my way and stored it upright and high up.
    I'll inspect the tray and the Cpus closely
    Thanks
     

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12 September 22, 2017