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No Chime On MacPro 2009 upgraded to 5.1

T

tarafran

macrumors newbie
Original poster
Mar 6, 2008
22
0
Key West
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
 
Last edited:
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?
 
ActionableMango said:
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?
Click to expand...
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
 
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.
 
Last edited:
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

 
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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