• Code: 816
• Description: Energy saving I/O sub-system error The energy saving I/O sub-system detects an error.
• Causes: • Controller board defective
• Remedy: Replace the controller board.

• Code: 840-00
• Description: EEPROM error 1: EEPROM access CTL • During the I/O processing, a read error occurred. The 3rd reading failure causes this SC code. • During the I/O processing, a write error occurred.
• Causes: • Defective EEPROM
• Remedy:

• Code: 841-00
• Description: EEPROM error 2: EEPROM read/write error CTL Mirrored data of the EEPROM is different from the original data in EEPROM.
• Causes: • Data in EEPROM was overwritten for some reason.
• Remedy:

• Code: 842-00
• Description: NAND-Flash Update Verify Error Detected. CTL SCS write error (verify error) occurred at the Nand-Flash module when remote ROM or main ROM was updated.
• Causes: Nand-Flash failed
• Remedy: • Cycle the machine off/on. • Replace controller board

• Code: 842-01
• Description: Insufficient Nand-Flash blocks (threshold exceeded) CTL At startup, or when machine returned from low power mode, the Nand- Flash status was read and judged that the number of unusable blocks had exceeded threshold, and then SCS generated the SC code.
• Causes: Number of unusable blocks exceeded threshold for Nand-Flash
• Remedy: • Replace controller board

• Code: 842-02
• Description: Number of Nand-Flash block deletions exceeded CTL At startup, or when the machined returned from low power mode, the Nand-Flash was read and judged that the number of deleted blocks had exceeded threshold, and then SCS generated this SC code.
• Causes: Number of blocks deleted exceeded threshold for Nand-Flash
• Remedy: • Replace controller board

• Code: 855-01
• Description: Wireless LAN card error 1 CTL A problem occurred when the installed Wireless LAN device was installed because is not supported by this machine, or the Wireless LAN device is defective.
• Causes: Wireless LAN device is not connected correctly, or the device is defective.
• Remedy: • Make sure that the wireless LAN is supported by this machine (IEEE 802.11 Interface Unit Type O M417). • Make sure that the device is installed correctly.

• Code: 855-02
• Description: Wireless LAN card error 2 CTL A problem occurred when the Wireless LAN device was not initialized at power on.
• Causes: The device is not installed correctly.
• Remedy: • Switch the machine off. • Make sure that the device is installed correctly.