if the service processor detects that its programming has been corrupted when it is powering up to standby mode, it will enter recovery mode. in recovery mode, it will ask for the firmware update diskettes by putting eight-digit codes on the operator panel.

    the eight-digit codes are as follows:

   

    1. if the wrong diskette is inserted at any time, or if the diskette is left in the drive after it has been read, b1fd 001f is displayed, indicating that the wrong diskette is in the drive.

    2. if b1fd 001a is displayed at any time during the process, the service processor must be reset by activating the pinhole reset switch on the operator panel.

    after the update process is complete, the service processor resets itself and goes through a complete reboot.