Toshiba e-STUDIO556 Service Manual page 702

[F109_5] Key consistency error (encryption key for ADI-HDD is damaged)
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.
Remark:
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 Status
* Access Failed
Access Failed *
OK KeyNull/
KeyBroken
KeyNull/ OK
KeyBroken
KeyNull/ KeyNull/
KeyBroken KeyBroken
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
Key consistency error - Encryption key for ADI-HDD is damaged.
Check the message displayed by [3] + [C] + [POWER] → 5. Key Backup
Restore.
Replace the SYS board.
 P.9-20 "9.2.4 Precautions and Procedures when replacing the SYS
board (for e-STUDIO556/656/756/856)" (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]Restoring procedure")
2. Recover the encryption key/license on the SYS board.
Follow the procedures below noted in  P.9-20 "9.2.4 Precautions and
Procedures when replacing the SYS board (for e-STUDIO556/656/756/
856)"
[D] Restore ADI key (only when ADI-HDD is installed)
[E] Restore encryption key
[F] Restore license
Replace the SRAM board.
 P.9-27 "9.2.7 Precautions and Procedures when replacing SRAM
board" (all steps)
Recover the ADI key on the SYS board.
 P.9-20 "9.2.4 Precautions and Procedures when replacing the SYS
board (for e-STUDIO556/656/756/856)" ([D]Restore ADI key)
Recover the encryption key on the SRAM board.
 P.9-27 "9.2.7 Precautions and Procedures when replacing SRAM
board" ([G]Backup ADI key)
<No USB backup data>
1. Create the partition in the HDD, and reinstall the system software.
 P.9-15 "9.2.3 Precautions and procedures when replacing the HDD"
(Perform step 3 or later in "[E]Replace / Format HDD")
<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]Restoring procedure")
2. Recover the encryption key/license on the SYS board.
Follow the procedures below noted in  P.9-20 "9.2.4 Precautions and
Procedures when replacing the SYS board (for e-STUDIO556/656/756/
856)"
[D] Restore ADI key (only when ADI-HDD is installed)
[E] Restore encryption key
[F] Restore license
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