The HP Z240 typically uses a SPI Flash memory chip. When looking for the "top" file, ensure it matches your specific motherboard revision:

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"Top" BIOS files often come with a "Clean ME" region. This ensures the firmware isn't tied to another machine's hardware state, preventing boot loops.

Flash the new BIN file and use the "Verify" function to ensure no data mismatches. Where to Find Verified BIOS BIN Files

A BIOS BIN file is a raw binary image of the workstation's Basic Input/Output System. Unlike the .exe or .cap files found on official driver pages (which are often encapsulated for Windows-based updates), a is a 1:1 copy of the data stored on the physical EEPROM chip.

If your Z240 takes a long time to boot or the fans run at 100%, the Management Engine (ME) region in the BIOS may be corrupted.