Toshiba e-STUDIO556 Service Manual page 701

[F109_4] Key consistency error (license data damage)
Classification
Other service call
Check item
License status confirmation
Take measures given in the following table according to the messages displayed in the SRAM Licence
Status and FROM Licence 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 Licence FROM Licence
Status
* Access Failed
Access Failed *
KeyMismatch KeyMismatch
* AccessFailed or KeyMismatch
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Key consistency error - The license data are damaged.
Check the message displayed by [3] + [C] + [POWER] → 5. Key Backup
Restore.
Status
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)
<The error occurs when the SYS board is replaced>
Recover the license on the SYS board. (Transfer the license from
SYS-SRAM to SYS-FROM.)
 P.9-20 "9.2.4 Precautions and Procedures when replacing the
SYS board (for e-STUDIO556/656/756/856)" ([F]Restore
license)
<The error occurs except when the SYS board is replaced>
Recover the license on the SRAM board. (Transfer the license
from SYS-FROM to SYS-SRAM.)
 P.9-27 "9.2.7 Precautions and Procedures when replacing
SRAM board" ([I]Backup license)
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Error item
Measures
Measures
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
8