MP 1,1-5,1 early-2009 dual CPU tray issues

[chuco915]

Apple Service Diagnostics, since it's an Apple internal tool, I'm not going to link it. Should be easy enough to search for it.

awesome!

thanks

 

[chuco915]

Apple Service Diagnostics, since it's an Apple internal tool, I'm not going to link or discuss about it. Should be easy enough to search for it.

thanks again!

 

[BrianRecchia]

That makes sense. Any idea why the fans are running at full speed? After I updated the CPUs to 5690, both sockets, is when this happened. My first cMP I did the upgrade to does not do that, but for this one not sure what I did wrong. I did exactly same thing from the video and on my first cMP.

Any ideas what it could be?

Check the northbridge heatsink, it’s the one that’s under the CPU heatsink. I have a feeling the plastic rivet there snapped or came undone.

Here’s a guide for working on it. The guide is made with the single socket CPU tray in mind, but it’s the same for the dual-socket one.

Mac Pro Single CPU Northbridge Heatsink Repair

Step by Step Illustrated Guide These are easy to follow instructions for replacing the plastic stays on the northbridge heatsink in a Mac Pro 4,1 &...

www.ifixit.com