True or False: After a System Board replacement, a field technician can input the service tag value only once.

The statement is true because, after a System Board replacement, the service tag value for that particular system is designed to be input only once by the field technician. This is crucial as the service tag uniquely identifies the system and is tied to the hardware's warranty and support history. Inputting the service tag helps ensure accurate tracking of repairs and service records. In many systems, this limitation is enforced to maintain integrity in the tracking process and to prevent potential errors or misuse of service tags in multiple entries. Therefore, once the service tag is entered after a system board replacement, it cannot be reapplied or modified for that specific board, emphasizing its one-time input nature.