[HELP] Acer Z3770 Help to make a downgrade file please

[kurtspirit]

Hello,
I flashed the bios of an ACER Z3770 PC with version P11-B0 BIOS P11-B0 and since then I have a problem detecting the hard drive:
The disk is well detected on the port but it no longer appears in the Hard Disk Drive Priority...

If I reset the bios by removing the battery, the PC boots without worries.

If I reboot the machine then I get a Disk Boot Error and the disk is undetected again.

I tried to flash the previous version P03-A2 P03-A2 but couldn't because I think the previous version flash is locked.

Do you have an idea or a solution to this problem? Maybe an unlock Bios is necessary for a rollback version ?

I've been looking everywhere for 5 days and I can't find anything.
Thank you in advance
jonathan

Here is a link with my fresh dump : Firmware Dump

[kurtspirit]

Hello,
I try to write the Rom file from Acer directly to the chipset and the computer doesn't start anymore.
Can someone help me to do something please?

Thank you very much.