When a Dell system has an "Admin Password" set in the BIOS, it locks the firmware settings. If that password is forgotten or entered incorrectly a set number of times (usually three), the system will generate a specific code. This code is a cryptographic hash derived from the Service Tag and the specific hardware serial number of the motherboard.
The suffix in a Dell BIOS indicates a newer security protocol where the password is encrypted and stored in a non-volatile flash memory chip. Unlike older models, simply removing the CMOS battery will not reset this password. Option 1: Official Dell Master Code (Recommended)
When you see a code like 2F37-G8FC8 or just #8FC8 , the computer is telling you: "I am locked. If you have the master password, enter it here."