: This tool was originally intended for internal Lenovo service providers and commercial IT administrators.
The file is the official executable installer for version 1.90 of the Lenovo ThinkPad Hardware Maintenance Diskette (HMD) , a specialized tool used by technicians to write or update system identification data—such as the Serial Number (S/N), Machine Type Model (MTM), and System UUID —directly into a laptop's motherboard EEPROM. When a ThinkPad motherboard (system board) is replaced, the new board arrives blank from the factory, triggering an "Invalid Serial Number" or "2200: 2201: Machine Type and Serial Number are invalid" error message on bootup. i7tm38us 1.90 version.exe download