• Code: 840
• Description: EEPROM access error
  During the I/O processing, reading error is occurred. The 3rd reading failure issues this SC code. During the I/O processing, writing error is occurred.
• Causes: Defective EEPROM
• Remedy:

• Code: 841
• Description: EEPROM read error
  Mirrored data of the EEPROM is different from the original data in EEPROM.
• Causes: Data in the EEPROM is overwritten for some reason.
• Remedy:

• Code: 842
• Description: Nand-Flash updating verification erro
  A writing error for the module written in Nand-Flash occurs when the remote ROM and ROM are updating.
• Causes: Damaged Nand-Flash
• Remedy: Turn the main switch off and on.

• Code: 853
• Description: Bluetooth device connection error
  (The Bluetooth interface unit was installed while the machine was turned on.) The Bluetooth interface unit was installed while the machine was turned on.
• Causes:
• Remedy: Turn off the main power switch, and then confirm that the Bluetooth interface unit was installed correctly. And then, turn on the main power switch again.

• Code: 854
• Description: Bluetooth device removed
  (The Bluetooth interface unit was removed while the machine was turned on.) The Bluetooth interface unit was removed while the machine was turned on.
• Causes:
• Remedy: Turn off the main power switch, and then confirm that the Bluetooth interface unit was installed correctly. And then, turn on the main power switch again.

• Code: 855
• Description: Hardware Problem: wireless LAN board
  The wireless LAN board can be accessed, but an error was detected.
• Causes: Loose connection. Defective wireless LAN card.
• Remedy: • Make sure that the Wireless LAN connection is good. • Replace the wireless LAN card.

• Code: 857
• Description: USB IF error
  USB I/F cannot be used due to a driver problem.
• Causes: An error has occurred to the USB driver.
• Remedy: • Make sure that the USB connection is good. • Replace the controller board.

• Code: 858
• Description: Data encryption conversion error (1)
• Causes: -01 A serious error has occurred during the data conversion performed for updating the key for data encryption. • The data in the USB flash drive is damaged. • A communication error has occurred due to electromagnetic waves or other noise. • Replace the controller board. * However, if it is "-30", the machine may recover by turning the main power switch off and then back on. -02 A Data encryption conversion error (2) A serious error occurs when data is encrypted to update an encryption key. Defective NVRAM Replace the controller board. -30 A Data encryption conversion error (3) A recoverable error has occurred before starting data conversion. Defective NVRAM • Turn the main switch off and on. • If the error reoccurs, replace the controller board. -31 A A serious error occurs while the data is encrypted. Same as SC991 Same as SC991
• Remedy: