Acer Aspire 3692WLMi - how to unlock Advanced BIOS menu?

Hi,
I found an old Acer Aspire 3692WLMi (Celeron M) somewhere in the basement and I want to use it for a small retro/server project.

The problem: I don’t have access to the Advanced menu in the BIOS.
The Supervisor password is CLEAR, but Advanced is still locked.

I have BIOS v2.90.
If anyone has done this on this series before, I’d really appreciate any concrete tips.

I believe in your skills and hope someone can help me find a solution to this problem.