HP ZBook 17 - how to locate slot for failing DIMM

[Dan_Saathoff]

When running memory diagnostic tests, I get a failure where the logs point to "Channel Num 0 DIMM Num 1" - but nothing about which of the four slots contains the failing DIMM.

Where can I find documentation that translates this Channel/DIMM numbering scheme to Slot Numbers 1-4 or physical slot locations (Primary or Expansion) mentioned in the service manual?

I've tried to keep this question brief and to the point, but I can provide more detail if necessary.

Thanks!

[SHThompson]

It might be in the service manual the simplest thing to do would be to remove two of the dimms and run the diagnostic again and see if it fails, if its still failing then it's one of the two dimms left.

When you're down to two just swap them one at a time with the two you've already removed.

[soccer_dan]

if yuo can tell us which ZBook 17 you have, G1, G2, G3, we can provide the slot location you need

[Dan_Saathoff]

Thanks!  

This computer is two years old, and I assume it must be "G1".  

The Product Number is F2P72UT.

[SHThompson]

That machine could still be in warranty have you checked?

[Dan_Saathoff]

Yes, the computer itself is actually under warranty, but I had purchased and installed 4 x 8GB Crucial-brand DIMMs myself to upgrade the factory-installed 8GB memory to 32GB total.  I did submit a support case (not for warranty service), but haven't yet received a definitive answer to my question.

Here is one guess on how Diagnostics DIMM numbers might map to physical slot locations: 

DIAGNOSTICS          PHYSICAL

DIMM #0                    Primary Slot #1

DIMM #1                    Primary Slot #2

DIMM #2                    Expansion Slot #1

DIMM #3                    Expansion Slot #2

Is this mapping scheme correct?

[Dan_Saathoff · Accepted solution]

I resorted to a trial-and-error approach of swapping DIMMs and running memory diagnostic tests to find the bad DIMM.  It was time-consuming (especially where I had to keep removing the optical drive and keyboard to get to the Primary slots), but I was eventually able to determine that I had TWO bad DIMMs, replaced those with new ones, and I'm back up and running with 32GB.

I never did get an answer about translating Diagnostics DIMM numbering to physical slot locations, but I managed to learn more through my testing.  Here is what I was able to determine:

DIAGNOSTICS                                     PHYSICAL

Channel #? / DIMM #0                    Primary Slot #1

Channel #? / DIMM #0                    Primary Slot #2

Channel #1 / DIMM #1                    Expansion Slot #1

Channel #0 / DIMM #1                    Expansion Slot #2

This really ought to be documented somewhere, and maybe I just wasn't able to find the right document.  I hope this information helps someone else.