Toshiba e-STUDIO 2555C Service Manual page 919

(6) The Remove screen is displayed, then press the [YES] button. If this screen is not displayed,
check whether the one-time dongle is installed in the equipment properly.
(7) After 10 to 40 seconds passes, the screen for notifying the success of performance is displayed.
Then press the [OK] button. If this screen is not displayed or the screen for notifying the failure of
performance is displayed, quit this operation by pressing the [NO]/[CLOSE] button. Then, check
whether the one-time dongle, which you used for uploading the selected license, is installed in
the equipment.
(8) Check that the returned license is not displayed on the screen.
Remarks:
If there are any other licenses to be returned, repeat from step (4).
If there is no more licenses to be returned, press the [CLOSE] button, and then turn the power
OFF.
[B] Replace the SYS board
Notes:
Before replacing the SYS board, perform the following procedure.
 P. 9-13 "9.2.1 Precautions when replacing PC boards"
(1) Confirm that the power is turned OFF.
(2) Replace the SYS board.
(3) Install DIMM to the new SYS board (from the old SYS board).
(4) Install SRAM board to the new SYS board (from the old SYS board).
(5) Install HDD to the new SYS board (from the old SYS board).
[C] Restore ADI key
If the ADI-HDD is installed, follow the steps below. To confirm the type of device, start up the equipment
in the 4C mode.
Notes:
If turning the power ON while pressing [3] and the [CLEAR] button simultaneously or restoring
the key is not possible, update the system firmware using the download jig, and then perform this
procedure again.
 P. 11-27 "11.4 Firmware Updating with PWA-DWNLD-JIG2F"
(1) Turn the power ON while pressing [3] and the [CLEAR] button simultaneously.
(2) Enter the password, and then press the [OK] button. (If the password is not set for Service, press
the [OK] button without entering anything.)
(3) Key in [5] to select "5. Key Backup Restore", and then press the [START] button.
(4) Key in [5] to select "5.ADI Key SRAM to FROM", and then press the [START] button.
(5) Wait until the restoring of the encryption key is completed. "Operation Complete" is displayed.
(6) Turn the power OFF.
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REPLACEMENT OF PC BOARDS/HDD
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