BIOS unlocking for Sony laptop

[Devaprem]

Hi,

I have a Sony VPCF23B9E laptop on which I would like access to the BIOS advanced features. Specifically, I want to change the HDD controller from AHCI to IDE (Legacy) mode so as to test a hard drive with a manufacturer's utility (Seatools for DOS). The BIOS is American Megatrends and the version is R2150V3 (EC version K2150V3 / ME version 7.1.13.1088) - see attached image. Is there anyone who can offer me advice or help?

I'm new to these forums and have read the thread at https://www.bios-mods.com/forum/Thread-S...CF2?page=2. That was updated some time ago so I've posted this new thread. However, please move to that or some other more appropriate thread if required.

Thanks in advance!