• Code: 821
• Description: CPU and ASIC timer error
• Causes: • Turn off the machine and turn it back on. • Replace the controller if the error is frequent.

• Code: 822
• Description: HDD timeout error
• Causes: • Examine the connection between the HDD and the controller • Replace the HDD if the error is frequent.

• Code: 823
• Description: NIB self test error
• Causes: • Turn off the machine and turn it back on. • Examine the connection between the NIB and the controller. • Replace the NIB if the error is frequent.

• Code: 824
• Description: NVRAM error
• Causes: • Replace the NVRAM if the error is frequent.

• Code: 827
• Description: SDRAM error
• Causes: • Replace the controller if the error is frequent.

• Code: 828
• Description: Flash ROM error
• Causes: • Replace the controller if the error is frequent.

• Code: 829
• Description: Optional RAM error
• Causes: • Examine the connection of the optional memory. • Replace the optional memory if the error is frequent.

• Code: 835
• Description: Parallel interface error
• Causes: • Replace the controller if the error is frequent.