When you replace the system board, you must set the UUID on the new system
board as follows:
1. Install the ThinkPad Hardware Maintenance Diskette Version 1.73 or later, and
2. From the main menu, select 4. Assign UUID.
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ThinkPad W700 and W700ds Hardware Maintenance Manual
restart the computer.
A new UUID is created and written. If a valid UUID already exists, it is not
overwritten.