• Code: 841
• Description: EEPROM error 2: EEPROM read/write error
  Mirrored data of the EEPROM is different from the original data in EEPROM.
• Causes: Data in the EEPROM is overwritten for some reasons.
• Remedy: Turn the main switch off and on.

• Code: 842
• Description: Flash ROM verification error
  Verification error of the flash ROM on the controller board occurs. • This SC is logged at 1st error detection. • SC819 is issued at 2nd error detection.
• Causes: • Defective flash ROM (controller board)
• Remedy: Replace the flash ROM.

• Code: 851
• Description: IEEE 1394 I/F Abnormal
  IEEE1394 interface error.
• Causes: • IEEE1394 interface board defective • Controller board defective
• Remedy: 1. Turn the main switch off and on. 2. Replace the IEEE1394 interface board. 3. Replace the controller.

• Code: 853
• Description: Wireless LAN board error 1
  At startup the wireless LAN board could be accessed, but the wireless LAN board (IEEE 802.11b or Bluetooth) could not access the controller board.
• Causes: • Wireless LAN board not installed when the machine was turned on
• Remedy: Check the wireless LAN board is installed correctly.

• Code: 854
• Description: Wireless LAN board error 2
  The board that holds the wireless LAN board can be accessed, but the wireless LAN board (802.11b or Bluetooth) itself cannot be accessed while the machine is operating
• Causes: • Wireless LAN board has been removed during machine operation.
• Remedy: Check the wireless LAN board is installed correctly.

• Code: 855
• Description: Wireless LAN board error 3
  An error was detected for the wireless LAN board (802.11b or Bluetooth).
• Causes: • Wireless LAN board defective • Wireless board connection not tight
• Remedy: 1. Check the connection. 2. Replace the wireless LAN/Bluetooth card.

• Code: 857
• Description: USB I/F Error
  The USB driver is unstable and generated an error. The USB I/F cannot be used. The USB driver can generate three types of errors: RX, CRC, and STALL errors. Only the STALL error can generate this SC code.
• Causes: • USB 2.0 disconnected • Controller board defective
• Remedy: 1. Check the connection. 2. Replace the controller board.

• Code: 858
• Description: Data encryption conversion error
  A serious error occurred during data encryption.
• Causes: • Defective controller board
• Remedy: [0] A Key acquisition error: The controller fails to get a new encryption key. • Defective controller board Replace the controller board. [1] A HDD key setting error: The controller fails to copy a new encryption key to the HDD. Defective SATA chip on the controller board • Turn the machine power off/on • If the error reoccurs, replace the controller board [2] A NVRAM data encryption error 1: An error occurs while the NVRAM data is encrypted. Defective NVRAM on the controller board • Replace the NVRAM [30] A NVRAM data encryption error 2: An error occurs before the NVRAM data is encrypted. Defective controller board • Turn the machine power off/on • If the error reoccurs, replace the controller board [31] A Other error: A serious error occurs while the data is encrypted. See SC991