• Code: 827
• Description: Self-diagnostic Error: RAM
• Causes: • Memory malfunction

• Code: 828
• Description: Self-diagnostic Error: ROM
• Causes: • Defective controller board • Firmware defective

• Code: 829
• Description: Self-diagnostic Error: Optional RAM
• Causes: • RAM DIMM defective • Defective controller board

• Code: 835
• Description: Self-Diagnostic Error: Parallel Interface
• Causes: • Loopback connector not detected • IEEE1284 connector defective • Defective controller board

• Code: 836
• Description: Self-diagnostic Error: Resident Font ROM
• Causes: • Font ROM defective

• Code: 837
• Description: Self-diagnostic Error: Optional Font ROM
• Causes: • Font ROM defective

• Code: 838
• Description: Verification error
  The verification data of the clock generator is read via the communication bus. The data contradicts the normal value.
• Causes: • Defective controller board

• Code: 850
• Description: Network I/F abnormal
• Causes: • Incorrect network setting • Defective controller board