• Code: 835
• Description: Self-Diagnostic Error: Parallel Interface
  Loopback test error.
• Causes: • Loopback connector not detected • IEEE1284 connector defective • Controller board defective

• Code: 836
• Description: Self-diagnostic Error: Resident Font ROM
  The resident font ROM returned an error during the self-diagnostic test.
• Causes: • Font ROM defective

• Code: 837
• Description: Self-diagnostic Error: Optional Font ROM
  The optional font ROM returned an error during the self-diagnostic test.
• Causes: • Font ROM defective

• Code: 838
• Description: Self-diagnostic Error: Clock Generator
  Verify error occurred when setting data was read from the clock generator via the I2C bus.
• Causes: • Clock generator abnormal • I2C bus abnormal • CPU port for the I2C bus abnormal

• Code: 840
• Description: Self-Diagnostic Error 1: EEPROM Access Error
  During input/output with the EEPROM, one of the following errors occurred: • A read error occurred, then continued after 3 retries. • Write error occurred.
• Causes: • EEPROM defective • EEPROM worn out

• Code: 841
• Description: Self-Diagnostic Error 2: EEPROM Read/Write Data Error
  The values of the data written and mirrored in 3 errors are all detected as not matching
• Causes: • The data is being written into the 3 designated errors differently

• Code: 850
• Description: Network I/F Abnormal
• Causes: • NIB defective • Controller board defective

• Code: 851
• Description: IEEE 1394 I/F Abnormal
• Causes: • IEEE1384 interface board defective • Controller board defective