Intel Network Card and Management Engine fail to initialize

[SDH]

May I note that this same jumper exists on multiple other HP workstations and thus this method may apply to others.  For example, the Z420 and Z620 are built on the same motherboard PCB with only small differences in appearance.  In the pic below #37 is the Flash Override jumper position.  Jumper at #38 is the Password clear jumper.  A third poorly documente but important jumper is between the bottom two PCI(e) slots (23-24) in this diagram.  That is the Crisis Recovery jumper that finally was documented best by HP when there was a rash of BIOS corruption that in some cases could be fixed by the method described for the ZX40 and earlier generation workstations, and also detailed in our long-running "Crisis Recovery Jumper" post in this forum.  Below is the HP link to the ZX40 HowTo, and some motherboard diagrams and pictures are below that:

https://support.hp.com/us-en/document/c05163478

There is a link HERE  to an archived thread from our forum on the HP method of use of the FO jumper in the Z820 to enable updating the ME firmware.  This same detailed method will apply to other HP workstations.  Dan_WGBU is a HP engineer who has provided valuable insight from within the HP Workstation Division on some of these more obscure procedures.  There are critical steps he provides in that archived post worth knowing and which I have not found elsewhere. 

Of interest I recall Dan explaining that this jumper changed in position from early to later Z820 motherboards.  This is not the case for the Z420/Z620.  In the combined ZX20 Technical and Service guide latest edition, v5, the Z820's ME FO header position is shown only at the far bottom front corner of the motherboard (in its original position, very hard to get to).  Subsequently HP moved it up to near the front edge of the motherboard just beneath the right (front) side of the lowest memory slot "CPU0-DIMM1".  Dan's official Z820 engineering diagram correctly shows the later position.... you need to rotate his image 90 degrees leftward to orient it to match what things look like with the computer standing on its feet, and also review the later version Z820 motherboard picture below with that "ME FO" jumper circled.

https://h30434.www3.hp.com/t5/Desktops-Archive-Read-Only/Z820-ME-Firmware-amp-Management-is-Disabled...

Below is a picture of what the later versions of the Z820 motherboard look like, and then the earlier version pic.  The early ones had the FO jumper at the far bottom front corner (bottom right area) and from looking at eBay pics of those the jumper was black or rarely green, and very hard to get to.  The motherboard header in both cases is 3-pin.  In the early version the pins were 1-3 left to right with the #3 pin being at the far bottom front corner of the motherboard.  Park position of the jumper is on pins 2-3, and to flash the ME firmware you would follow Dan's sequence in his post and temporarily move the jumper to pins 1-2.  For the newer Z820 motherboards same idea:  Pins 1-3 are oriented bottom to top, with park position of the jumper across pins 2-3, and ME flash position temporarily "shorting" pins 1-2.  Make sure to follow the exact sequence Dan provides in his linked post above.

Original ME FO jumper position on early Z820 motherboard versions: