Toshiba e-STUDIO556 Service Manual page 700

[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.
Remark:
If the error is not cleared, reinstallation of the OS data, master data and application is needed.
SRAM Key FROM Key
Status Status
* Access Failed
AccessFailed *
OK KeyNull/
KeyBroken
AccessFailed OK
KeyNull/ OK
KeyBroken
KeyNull/ KeyNull/
KeyBroken KeyBroken
* AccessFailed, KeyNull or KeyBroken
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
Key consistency error - Parameter used for HDD partition encryption are
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 encryption 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)" (all steps)
Replace the SRAM board.
 P.9-27 "9.2.7 Precautions and Procedures when replacing SRAM
board" (all steps)
Recover the encryption key on the SRAM board.
 P.9-27 "9.2.7 Precautions and Procedures when replacing SRAM
board" (for the SYS board, [H]Backup encryption key)
<No USB backup data>
1. Reinstall the system software.
 P.11-9 "11.2 Firmware Updating with USB Media"
<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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Error item
Measures
Measures