Toshiba e-STUDIO477S Service Manual page 167

[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.
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 Status
* AccessFailed
AccessFailed *
OK KeyNull/
KeyBroken
KeyNull/ OK
KeyBroken
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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. 6-18 "6.2.4 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 "9.1.4Cloning procedure [B]Restore
procedure")
2. Recover the encryption key/license on the SYS board.
Follow the procedures below noted in "6.2.4Precautions
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 SRAM board (for the SYS board).
 P. 6-22 "6.2.5 Precautions and procedure when replacing
the SRAM board (for the SYS board)" (all steps)
Recover the ADI key on the SYS board.
 P. 6-18 "6.2.4 Precautions and Procedures when replacing
the SYS board" ([C]Restore ADI key)
Recover the encryption key on the SRAM board.
 P. 6-22 "6.2.5 Precautions and procedure when replacing
the SRAM board (for the SYS board)" ([G]Backup ADI key)
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Contents
Measures
Measure
e-STUDIO477S/527S/477SL
ERROR CODE AND TROUBLESHOOTING
5