• Code: 790
• Description: PCB fan error: Folder Unit The machine detected a continuous lock signal from the PCB cooling fan on the PSU for 20 sec.
• Causes: • Fan harness connector loose, disconnected, broken • Overload on the fan motor due to physical obstruction such has undetected paper, etc. • Fan defective • MCU folder unit defective
• Remedy:

• Code: 819
• Description: Fatal kernel error Due to a control error, a RAM overflow occurred during system processing.
• Causes: • Controller board defective • Insufficient memory • Expanded memory defective
• Remedy: For more details about this SC code error, execute SP5990 to print an SMC report so that you can read the error code. The error code is not displayed on the operation panel.

• Code: 820
• Description: Self-Diagnostic Error: CPU The CPU returned an unexpected error during the self-diagnostic test.
• Causes: • Controller board defective • Insufficient memory • Expanded memory defective
• Remedy:

• 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: • Controller board defective
• Remedy: For more details about this SC code error, execute SP5990 to print an SMC report so that you can read the error code. The error code is not displayed on the operation panel.

• Code: 822
• Description: Self-diagnostic error 3: HDD An error occurred when the self-check was performed when the machine was switched on after the HDD was replaced. (The diagnostic command was issued to the HDD device but the result was an error).
• Causes: • HDD defective • HDD harness disconnected, defective • Controller board defective
• Remedy:

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

• Code: 824
• Description: Self-diagnostic error 4: NVRAM Error occurred because: • NVRAM device does not exist • NVRAM device is damaged • NVRAM socket damaged
• Causes: • NVRAM defective
• Remedy:

• Code: 826
• Description: Self-diagnostic Error 5: RTC/Optional NVRAM The NVRAM or optional NVRAM returned an error during the self-diagnostic test.
• Causes: • Make sure NVRAM is seated correctly in its socket • Replace the NVRAM on the controller board
• Remedy: