My laptop BIOS settings can be Legacy or UEFI, but the problem is that I forgot the Supervisor Password. I'm completely locked out. I did everything like resetting RAM, CMOS, draining cmos. etc. I even contacted Dell for the backdoor password and It did not work. They just told me to replace my motherboard.
So I've tried many way. I also tried to download the latest BIOS in Dell website for my laptop. and I tried to install it in my non Dell PC in order to get the ".fd" file in it. I copy it in my new fresh formatted 3.0 USB FAT32 and I proceed by pressing the END key while my laptop is unplugged. and after plugging it the lights where blinking. but no still no display I waited for over 5 minutes and still no display. I try to unplugged my USB and still showing the Dell logo and asking for my supervisor password. which means that the upgrade did not work.
What do you recommend guys? THANKS.
Laptop Model: Dell Inspiron 5520
BIOS Type: InsydeH20