Toshiba e-STUDIO 2555C Service Manual page 782

Check item
Setting
[F109_3] Key consistency error (HDD encryption parameter damage)
Classification
Other service call
Check item
Encryption key status confirmation
Take measures given in the following table according to the messages displayed in the SRAM Key
Status and FROM Key Status fields.
Remarks:
If the error is not cleared, reinstallation of the system firmware, system software and application
is needed. ([4]+[9] → Power-ON)
SRAM Key FROM Key
Status
* AccessFailed
AccessFailed *
OK KeyNull/
KeyBroken
AccessFailed OK
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
Reboot the equipment.
If it cannot be recovered, reinstall the software in the
following procedure.
1. Install the system firmware.
2. If the error cannot be solved after installing the system
firmware, reinstall the system software and application
program.
 P. 11-21 "11.3.2 Update procedure"([A]Updating
firmware)
Key consistency error - Parameter used for HDD partition
encryption are damaged.
Check the message displayed by [3] + [C] + [POWER] → 5.
Key Backup Restore.
Status
Replace the SYS board.
 P. 9-22 "9.2.4 Precautions and Procedures when replacing
the SYS board" (all steps)
<With USB backup data: All key data recovery>
1. Recover all the data on the SRAM board.
[5] + [9] + [POWER] → 2. Restore SRAM Data from USB
(For details, see "12.1.4Cloning procedure [B]Restore
procedure")
2. Recover the encryption key/license on the SYS board.
Follow the procedures below noted in "9.2.4Precautions
and Procedures when replacing the SYS board".
[C] Restore ADI key (only when ADI-HDD is installed)
[D] Restore encryption key
[E] Restore license
Replace the SYS board.
 P. 9-26 "9.2.5 Precautions and procedure when replacing
the SRAM board (for the SYS board)" (for the SYS board, all
steps)
Recover the encryption key on the SYS board.
 P. 9-22 "9.2.4 Precautions and Procedures when replacing
the SYS board" ([D]Restore encryption key)
Replace the SRAM board (for the SYS board).
 P. 9-26 "9.2.5 Precautions and procedure when replacing
the SRAM board (for the SYS board)" (all steps)
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Measures
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Measures
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