The Dell Latitude 5520 uses a modern system security architecture. Unlike older laptops, it does not store BIOS passwords in volatile CMOS memory that clears when you pull a coin-cell battery.
Restart your computer and press repeatedly at the Dell logo. Enter your current BIOS password.
The password is stored in non-volatile memory (NVRAM) inside the Nuvoton EC (Embedded Controller). dell latitude 5520 bios password reset
Find your suffix code using the method in (e.g., -8FC8 ).
Disclaimer: This guide is for educational purposes and legitimate password recovery on hardware you own. Unauthorized access to computers you do not own is illegal. The Dell Latitude 5520 uses a modern system
Use a flathead screwdriver or tweezers to bridge those two metal pads together. Hold the connection for 15 to 20 seconds.
Input your full Service Tag and suffix (e.g., ABC1234-8FC8 ). Enter your current BIOS password
Power on the machine, type an incorrect password three times, and note the exact code displayed on the screen (e.g., Service Tag: ABC1234-8FC8 ).
: Select the System Password or Setup Password option.
: Enter an incorrect password three to five times until a system number or hash code is displayed.
Press and hold the laptop for 30 seconds to drain residual electricity. Wait 5 to 10 minutes.