some time ago I have updated the BIOS of my motherboard to a beta version that was on the official bios download page (7A34vALM, not available there anymore), since previously each bios update added new features and improved memory compatibility, and there were no warnings on the page, I didn't expect any issues. Initially I noticed faster boot times so I was happy with it. Unfortunately as it turns out the PC tends to crash sometimes with this BIOS version (mostly on windows which I fortunately don't use much). I decided to roll back to a previous one. I did the usual procedure: downloaded the file from the website and put it on a pendrive, connected the pendrive and booted into the "M-Flash" mode, to my surprise the drive list there was empty, showing only one entry that looked something along the lines of 'FS0: <empty string>', when I tried to select it, some message about no file or something along these lines popped up with the option to boot back to BIOS. Sending it to a service center would be quite inconvenient so I would be really happy if I could fix it myself.
I have searched for other ways to flash the BIOS but the live update tool linked on support page for this motherboard just said I'm on the latest version so there's nothing to do. I found "AMI Tool" mentioned somewhere so I downloaded the latest version from AMI website and tried using it with the update files from MSI website, neither the Windows nor the UEFI versions seemed to work (In the UEFI version I used /P /B /K options and on windows I used the GUI with the equivalent options selected, both with two different versions of the update file from the MSI website), on windows it mentioned something about it not matching the current ROM and in EFI shell for the older version (7A34vAJ) it didn't seem to recognize it and for the newer (7A34ALP) it failed to verify some checksums (I've tried redownloading both files).
After more digging I have found this thread https://www.overclock.net/forum/11-a...correctly.html
which shows a different way of flashing the bios with the AMI UEFI tool.
1. It seems to show different file formats (or just extensions?) than the official updates, possibly this tool doesn't read this format and that's the reason why it didn't work?
2. Can I flash the modified bios as per that guide and then go from that to official 7A34vAJ? (I would consider using the modified one if it works well too) or maybe just flash the official update file somehow with it?
3. This guide seems to tell you to wipe and reflash all the memory of the BIOS chip, does that include any stuff like serial number, mac address, etc or is this stored somewhere else?
4. Should I be asking about it in that thread instead? Is there any documentation of this stuff you know of that I have missed? Sorry if I'm asking in the wrong place
Thank you for taking the time to read this and for any answers