HP 250 G7 : Can I flash microcode only?

[castillofr]

Yes! I am on it.

[castillofr]

It seems OK now! Please see attached.

[DeathBringer]

Good!
Now try again:
fptw64 -a 0x2B9800 -l 0x19400 -f 806EA.bin
Make a screenshot of result.

[castillofr]

Just to be sure:
By doing so, there is no risk to brick the BIOS?

[DeathBringer]

If the file 806EA.bin is still unmoded then no risk.

[castillofr]

OK!!    

[DeathBringer]

OK. Write-protection is disabled now.
Download latest microcode for your CPU - https://github.com/platomav/CPUMicrocode...ACEE16.bin
Rename it to 806EA_new.bin and run:
fptw64 -a 0x2B9800 -l 0x19800 -f 806EA_new.bin
Make a screenshot of result.

[castillofr]

OK!
No risk to brick?

[DeathBringer]

In this case, there is a risk only if the BIOS is protected against any modification.
But this is the only way to replace microcode without full BIOS flashing.

[castillofr]

I think it is? It was encrypted and RSA signed when I use stock flash.

I can easily recover the BIOS?


Recomended: dump the BIOS region first, update the microcodes (how?) then flash back the updated BIOS region with FPT...