z820 POST Error - "517 Memory fan not detected."

[knoba]

8 of 16 ram slots are filled. Fault is intermittent. I thought it may be a dicky fan in the m/b fan array cartridge (and wondering how to diagnose for that specific issue), but, looking around, the machine may require a "HP Memory Cooling Kit"?

* Consistent POST Error - 517 Memory configuration requires a Memory fan and this fan is not detected 

* HP Z440, Z640, Z840 - BIOS Fan Error Message Decoding 

Specs

O/S: Linux Mint, 21.3, "Virginia", Xfce, kernel 5.15.0-107-generic (x86_64).
BIOS: Intel J63 v03.96, Boot block date: 03/06/2013.
M/B: HP (708610-001), model:158B, Pcb Rev:1.03 (Gen 2 System Board), PCI-Express 3.0.
(2012 SP# 708610-001 No DPK CT:PEJKLORM47X1LZ AS# 618266-004 SP# 708610-601 W8 Pro REV oR)
CPU1: Intel Xeon E5-2643 v2, (SR19X), 3.5GHz, 6 core, Socket 2011 / LGA2011, 130 W, 15MB L3, 1866MHz, 64 bit, Cache 25MB.
CPU2: Intel Xeon E5-2643 v2, (SR19X), 3.5GHz, 6 core, Socket 2011 / LGA2011, 130 W, 15MB L3, 1866MHz, 64 bit, Cache 25MB).
H/S: Heatsink, x2, 3 heatpipe version, (635868-001), Hp spares 636164-001.
RAM: Samsung (M393B2G70EB0-CMAQ2 M), HP (712383-081), 128GB (8 x 16GB), DDR3-1866MHz, PC3-14900R, RDIMM, ECC Registered, 16 slots, 240 pin.
GPU: Palit GeForce GTX 1070 Ti (NE5107T015P2-1043D) 8GB, 2.5 Slot, Dual link DVI-D, HDMI (2.0b), 3x DisplayPort (1.4).
SSD1: ATA PNY CS900 240GB, 2.5", Internal SSD, SATA 6, AHCI. Caddy (654540-001), [/dev/sda].
SSD2: ATA PNY CS900 240GB, 2.5", Internal SSD, SATA 6, AHCI. Caddy (654540-001), [/dev/sdb].

PSU: Delta Power Supply (DPS-1125A-AB), (HP 623196-002), 1125W, multirail.

[DGroves · Accepted solution]

the main cooling shroud for the z820/840 contains the cpu fans, and the memory fans

all fans are removable from the shroud and simply pop out by removing the fans plastic holding tabs

you can then remove the fans 4 pin power lead from the shrouds fan connection headers

for your issue simply note the memory fans part number printed on the fan label and order a replacement 

you can id which fan by using aida64 or the HP Perf Advisor (Workstations)

https://valuehub.hp.com/tools/hp-software-tools/hp-performance-advisor/

https://www.hp.com/us-en/workstations/performance-advisor.html

[knoba]

Thank you! Bad fan or bad connections.