@rycyve The problem is that the M900 only ever supported Skylake and never had Kaby Lake support added to any BIOS.

You might want to read this thread as someone did get it to work by combining the BIOS region from a M910 but unfortunately didn't upload the modified BIOS, although they did say there were several isues.

Zitat von IntelModder im Beitrag Lenovo M900 Tiny Coffee Lake

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For anyone in a similar situation with a Lenovo 100 series board, I managed to get this to work by combining the bios section from a Lenovo M910 (Q270) UEFI update with my vbios settings and the right ME version, and then running it through CoffeeTime.

Once flashed it gave two errors about invalid machine type and serial number. You can correct these by booting an efi shell with AMIDEEFIx64.efi (from the UEFI update package) and entering the data from the label on the machine. UUID can be generated using this program as well.

Currently, one DisplayPort doesn't function and M2 and Sata drives won't show up in the bios (although they will show up in windows installer). Work in progress.

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chinobino thanks for the reply. i am fully aware of these topics and i have working bioses on my device but they can only be flashed by a programmer. I want to first know the dump file so that the program can basically flash it back. i tried fpt and flashrom but they can't open them due to oem bios protection. can't find threads where it can be done.

@rycyve Yep, you have PRR that are preventing software tools from flashing - you'll need to use a programmer to flash any unnofficial/modded BIOS.

in fact there is a bios dump that can be used on a program basis but not by its creator.
Lenovo M900 Tiny Coffee Lake
https://forums.servethehome.com/index.ph...us.30734/page-2

then i finally got this result when modifying 8mb bios by changing gop, gop vbt and vbios. flash is not daring yet because ch341 is still coming and vice brick to make a pc. who has ch341a can try this bios. left oem and right mod bios. I'll upload it here too.


[[File:imagefw.rar]]