After a bios flash ME is no longer available on my HP Z420, I have tried to reflash bios both in dos and windows but had no success - bios now lists ME FW version as 0.0.0.0 and there is no options in bios for ME/AMT.

Computer starts up and works as it should but I have 3 devices that can not start in device manager, adding drivers does not help either - this mb has a Bios ME/AMT Flash Override jumper but flashing bios with this setting makes no difference.
I'm able to save my current bios using with override jumper activated: - fptw -d spi.bin
Using dos tools I get an error 8193 'Cannot locate ME device driver' , in widows I get error 1002,9458 and 9459 - see pictures.

Right now I'm at bios 3.88 - it should have ME 8.1.60.1561 - link to sp71579.exe


Is it possible to extract ME from bios update file and flash only ME region ?

Not sure if you use AMT, but if not, try disabling it in the bios, some of those 'missing' devices should be gone.

Zitat von plutomaniac im Beitrag #2

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Use UEFITool to "extract as is" the ME region from the HP SPI image (Rom.bin). Set the service jumper and run "fptw -rewrite -me -f me.rgn", where "me.rgn" is the extracted ME region, followed by "fptw -greset". Set the jumper back to its default position and the Engine firmware should be healthy once again.

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Zitat von mtothaj im Beitrag #3

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Not sure if you use AMT, but if not, try disabling it in the bios, some of those 'missing' devices should be gone.

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That's the weird thing, I have no post error about warning or provisioning error and computer does not power off after 30 minutes either.
Only problem I have is 3 devices in device manager with yellow exclamation mark.

I will try the Hp dmi tools.

I had no luck with the dmi tools floating on the net, either they did not work at all or my hw was not supported. Most of the utils error msg was ' Your notebook is not supported by this utility' so clearly they are only for laptops and not workstations.

So I tried some soldering instead.


Bios chip is quite close to the sata ports.

Wetted properly.

..and removed chip and cleaned pads

I reprogrammed it with an unmodified bios file from HP.



I kind of new I would have a few problems so I decided not to resolder the chip back on but instead use the pliers trick - it works beautifully as the pliers press point fits and holds the chip in place.




Machine starts up and AMT option is back in bios, sadly mac lan address was FFFFFFFFFFFF but using Intel's Eeupdate /nic number /mac=123456789123 in dos fixed it back to what I earlier had.
Intel's hw test passes in windows so seems to be ok.


Ctrl+A opens additonal fields in Security>System IDs menu so I successfully added the proper asset tag, UUID, chassis sn, build ID and featurebytes.
Remember that the build ID has a few ** on your chassis label so take picture of bios system IDs menu before you reflash and start experimenting.




The new problem now is 'Management platform (ME) in manufacturing mode' and I can't seem to fix it.

Any ideas or clues ?

Ahh plutomaniac posted som nice information about ME manufacturing mode - link

I ran 'fptw -closemnf' in windows and computer restarted and 'Management platform (ME) in manufacturing mode' was gone.
I don't know if it's needed but I used -greset after reebot.




Before I solder back the chip does anyone know if this looks correct ? Not provisioned and Pre provisioning I not sure about.

Here is the MEInfo tool readout, system UUID and mac address I painted out but are listed correctly.


What I don't like is OEM Id and OEM Tag's showing just zeroes and Slot1,2,3 listed as unused. Is that normal ?





Now AMT is listed in Aida too,added pictures.

MEInfo -verbose lists 'No error' under ErrorCode, AMT option is back in bios and I have no yellow exclamation mark in device manager so I think I'm happy, I'll just resolder the chip and call it a success.

Thanks for your help and tips.

I will check, give me an hour or so.

What is ICC ?

Did not change anything, still has no vaild oem data.

I will try an ME fw update - HP has released an update from ME 8/9 to 10.0.1.1000 - Link

EDIT:
There is no fw update just new drivers as I can see.

Tried -greset both with and without override jumper activated, did not work.

Anyone have a valid bios dump for HP Z420 ?