• Code: 804
• Description: Startup without video input end (K)
  A video transmission was requested from the scanner, but the scanner did not issue a video transmission end command within the specified time.
• Causes: • Controller board defective

• Code: 818
• Description: Watchdog error
  While the system program is running, no other programs can run (due to a bus hold or endless loop).
• Causes: • Defective controller board

• Code: 819
• Description: Kernel abnormal end error
  A HDD error or a software error has occurred, terminating the SCS process, gwinit process, and finally the kernel program. A system process has exhausted the RAM.
• Causes: • HDD error • Software application error • RAM shortage • MBU jumper set incorrectly. For more, see "Fax Option Type B766" manual "1. Installation".

• Code: 820
• Description: Self-Diagnostic Error: CPU
  An unexpected exception or interruption has occurred.
• Causes: • Defective controller board • Software defective • MBUjumper set incorrectly. For more, see "Fax Option Type B766" manual "1. Installation".

• Code: 821
• Description: Self-Diagnostic Error: ASIC
  The ASIC returned an error during the self-diagnostic test because the ASIC and CPU timer interrupts were compared and determined to be out of range.
• Causes: • Controller board defective

• Code: 822
• Description: Self-Diagnostic Error: HDD
  The hard disk drive returned an error during the self-diagnostic test.
• Causes: • HDD defective • HDD connector defective • Controller board defective

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

• Code: 824
• Description: Self-diagnostic Error: Resident NVRAM
  The resident non-volatile RAM returned an error during the self-diagnostic test.
• Causes: • Replace the resident NVRAM on the controller board • Replace the controller board