• Code: 857
• Description: USB I/F Error USB interface error detected.
• Causes: • Defective controller
• Remedy: 1. Check the USB connections, make sure that they are securely connected. 2. Replace the controller board.

• Code: 860
• Description: HDD start-up error HDD initialization error detected.
• Causes: • Defective HDD
• Remedy: 1. Check the HDD connection. 2. Reformat the HDD. 3. Replace the HDD.

• Code: 861
• Description: HDD: Reboot error The HDD does not become ready within 30 seconds after the power is supplied to the HDD.
• Causes: • Loose connection • Defective HDD • Defective controller
• Remedy: 1. Turn the main switch off and on. 2. Check the connection between the HDD and controller. 3. Replace the HDD. 4. Replace the controller.

• Code: 863
• Description: HDD data unable to read Data stored in the HDD cannot be properly read.
• Causes: • Defective HDD
• Remedy: 1. Check the HDD connection. 2. Reformat the HDD. 3. Replace the HDD.

• Code: 864
• Description: HDD data access error HDD access error detected.
• Causes: • Defective HDD
• Remedy: Replace the HDD.

• Code: 865
• Description: HDD access error An error detected during HDD operation.
• Causes: • Defective HDD
• Remedy: Replace the HDD.

• Code: 900
• Description: Electric counter error Abnormal data is stored in the counters.
• Causes: • Defective NVRAM • Defective controller
• Remedy: 1. Turn the main switch off and on. 2. Check the connection between the NVRAM and controller. 3. Replace the NVRAM. 4. Replace the controller.

• Code: 990
• Description: Unexpected software error Unexpected software error detected.
• Causes: • Defective controller
• Remedy: Replace the controller if the error is frequent.