Toshiba e-STUDIO 5540C Service Manual page 958

SRAM Key FROM Key
Status
KeyNull/ OK
KeyBroken
KeyNull/ KeyNull/
KeyBroken KeyBroken
KeyMismatch KeyMismatch
* AccessFailed or KeyMismatch
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
Status
Recover the encryption key on the SRAM board.
 P. 9-35"9.2.6 Precautions and Procedures when replacing
SRAM board (for SYS board)" ([G]Backup ADI key)
<No USB backup data>
1. Create the partition in the HDD, and reinstall the system
software.
 P. 9-25"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]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".
[E] Restore ADI key (only when ADI-HDD is installed)
[F] Restore encryption key
[G]Restore license
<The error occurs when the SYS board is replaced>
Recover the encryption key on the SYS board. (Transfer the
license from SYS-SRAM to SYS-FROM.)
 P. 9-30"9.2.4 Precautions and Procedures when replacing
the SYS board"([E]Restore ADI key)
<The error occurs except when the SYS board is replaced>
Recover the encryption key on the SRAM board. (Transfer the
license from SYS-FROM to SYS-SRAM.)
 P. 9-35"9.2.6 Precautions and Procedures when replacing
SRAM board (for SYS board)"([G]Backup ADI key)
Measure
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