Read ECA/rework number from EEPROM and follow theĤ. Insert the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart theĢ. To check what ECAs have been previously applied to the machine, use the ECA Information Read/Write function on the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later.ġ. The machine does not need to be disassembled to check for the ECA application. The electronic storage of this information simplifies the procedure to check if the ECA has been previously applied to a machine. Information on Engineering Change Announcements (ECA) are stored in the EEPROM of the system board. Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart theĢ. When you replace the system board, you must set the UUID on the new system board as follows:ġ. No two computers in the world have the same number. The algorithm that generates the number is designed to provide unique IDs until the year A.D. The Universally Unique Identifier (UUID) is a 128-bit number uniquely assigned to your computer at production and stored in the EEPROM of your system board. ![]() In the example, the Serial Number to be input is “1STTTTMMMSSSSSSS”. TTTT-MMM (Use this number when setting Serial Number)
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