• Code: 821
• Description: Self-diagnostic error 2: ASIC
  The ASIC provides the central point for the control of bus arbitration for CPU access, for option bus and SDRAM access, for SDRAM refresh, and for management of the internal bus gate.
• Causes: • ASIC (controller board defective)

• Code: 822
• Description: Self-diagnostic error 3: HDD
• Causes:

• Code: 823
• Description: Self-diagnostic Error: NIC
  The network interface board returned an error during the self-diagnostic test.
• Causes: • Network interface board defective • Controller board defective

• Code: 824
• Description: Self-diagnostic error 4: NVRAM
  NVRAM device does not exist, NVRAM device is damaged, NVRAM socket damaged
• Causes: • NVRAM defective • Controller board defective • NVRAM backup battery exhausted • NVRAM socket damaged

• Code: 826
• Description: Self-diagnostic Error: NVRAM/ Optional NVRAM
  The NVRAM or optional NVRAM returned an error during the selfdiagnostic test.
• Causes: • Make sure NVRAM is seated correctly in its socket • Replace the NVRAM on the controller board

• Code: 827
• Description: Self-diagnostic Error: RAM
  The resident RAM returned a verify error during the self-diagnostic test.
• Causes: • Update controller firmware again • Replace RAM DIMM

• Code: 828
• Description: Self-diagnostic error 7: ROM
  Measuring the CRC for the boot monitor and operating system program results in an error. A check of the CRC value for ROMFS of the entire ROM area results in an error.
• Causes: • Software defective • Controller board defective • ROM defective

• Code: 829
• Description: Self-diagnostic Error: Optional RAM
  The optional RAM returned an error during the self-diagnostic test.
• Causes: • Replace the optional memory board • Controller board defective