Fatal MCA Error 929, 932

[gerulag]

With Win 7 Pro 64 bit previously, and now with Win 10 Pro 64 bit, 929 Fatal MCA error QPI0, 929 Fatal MCA error QPI1, and 932 Warning one of the QPI links is not operating, have appeared, and in the past reseating the CPU1 riser has temporarily solved the problem until recently! I note that this problem has been archived and have read that post!

In my case reseating the CPU1 riser no longer worked! 

Close inspection of the 8 conductor on the motherboard revealed deterioration of the plastic on at least 2 of the contacts! This probably resulted in inadequate contact with the CPU1 riser, resulting in the 929 and 932 errors! Repair of the motherboard conductor contacts is impossible from within the case! Solution might be possible if I could hold the connector close in my hand! After considerable searching to find how to remove the right hand panel (HP Service Media Library D/C Nov 2019) I eventuall figured out how to remove the right panel, which allowed me access to the connector from the motherboard to the CPU1 riser! With the connector in hand I attempted to repair the 2 contacts which appeared not to align properly! After reassembling the connector and replacing it in it's proper position, I replaced the right hand panel after vacuuming the case!

With great relief I reassembled the CPU1 riser to the Motherboard, reattached the cables, and presto, successful boot, and thought that while this currently solved my error problems, that perhaps this information may be of some value to others with a Z620 and dual Xeons!

Thank you! 

[gerulag]

Correction: The motherboard cable and connection to the CPU1 riser conector is 12 Conductors and 12 contacts not 8 as reported in the previous post! My sincere apologies for this error!