DMI flashing is the process of burning unique system DMI (desktop management interface, or the layer between system components and the software that manages them) information such as the serial number and model number, onto the EEPROM of the system board. July 2010 HP Notebook DMI-DMIFIT Utility Process Overview Introduction HP notebook DMIFIT/DMI utility (tattoo) files allow an HP authorized Service provider to flash a new notebook system board.