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HP 250 G7 : Can I flash microcode only?
#21
Change to 00.
Reboot (Win10).
Reboot (RU) -> 01 again
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#22
Try to find the way to change them.
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#23
OK! Many Thanks DeathBringer
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#24
BTW: PchSetup has RT flag, so it can be edited in any OS with EFI boot (non legacy).
E.g. you can try to use UEFIVAR by Zibri
1. Dump PchSetup:
uefivar -G:"4570B7F1-ADE8-4943-8DC3-406472842384" -N:"PchSetup" -bd:"PchSetup.bin"
2. Edit PchSetup.bin in any hex-editor.
3. Import PchSetup:
uefivar -G:"4570B7F1-ADE8-4943-8DC3-406472842384" -N:"PchSetup" -I:"PchSetup.bin"
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#25
   
Unfortunately, it didn't work!
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#26
Run:
uefivar -l > list.txt
and show list.txt
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#27
(09-13-2020, 02:11 PM)DeathBringer Wrote: Run:
uefivar  -l > list.txt
and show list.txt


Attached Files
.txt   list.txt (Size: 8.3 KB / Downloads: 1)
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#28
Try to run:
uefivar -l -bd
and find a file with PchSetup in name.
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#29
@DeathBringer
I read that:
[Intel microcode update can be used, in a BIOS mod, but not flashed directly!]

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

Can you confirm this?
Thanks!
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#30
You can't flash BIOS by FPT without disabling write-protection.
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