• Code: SC822
• Description: Self-Diagnostic Error 2: HDD
• Causes: • One or both HDDs defective

• Code: SC824
• Description: Self-Diagnostic Error 3: NVRAM
• Causes: • NVRAM not installed • NVRAM defective • Controller board defective • Backup battery has discharged

• Code: SC826
• Description: Self-Diagnostic Error 4: RTC Backup Battery Error
  The RTC backup battery has discharged or the voltage of the installed battery is not within the specified range.
• Causes: • NVRAM installed incorrectly • RTC backup battery defective • Controller board defective • NVRAM defective

• Code: SC828
• Description: Self-Diagnostic Error 5: ROM Error
  Measuring the CRC for the boot monitor and operating system program results in an error. This check is not executed when booting the machine from an SD card.
• Causes: • SD card defective • Controller board defective

• Code: SC829
• Description: Self-Diagnostic Error 6: Optional RAM
  A check of the optional RAM installed in Slot 0 on the controller board returned anerror.
• Causes: • RAM DIMM installed incorrectly • RAM DIMM defective • RAM DIMM slot damaged or defective; replace the controller board

• Code: SC833
• Description: Self-Diagnostic Error 7: Engine I/F ASIC
  NOTE: For more details about this SC code error, execute SP5990 to print an SMC report so you can read the error code. The error code is not displayed on the operation panel.
• Causes: • The ASIC (Mandolin) for system control is defective • I/F between North Bridge and AGPI is defective NOTE: Replace the Mother Board.

• Code: SC834
• Description: Self-Diagnostic Error 8: Optional Memory RAM DIMM
  The write/verify check for the optional RAM chip on the engine I/F board (mother board) returned an error
• Causes: • Controller board defective • Mother board defective

• Code: SC838
• Description: Self-Diagnostic Error 9: Clock Generator
  Setup data is read from the clock generator via the I2C bus but differs from the prescribed value due to defects in the clock generator, in the I2C bus, or the I2C bus port for the PCU.
• Causes: • Controller board defective