• Code: 827
• Description: Self-diagnostics error: Standard SRAM DIMM [XXXX]: Detailed error code
• Causes: Turn the main switch off and on. Replace the SRAM DIMM. Replace the controller.

• Code: 828
• Description: Self-diagnostics error : ROM [XXXX]: Detailed error code
• Causes: Turn the main switch on and off. Replace the ROM DIMM Replace the controller.

• Code: 829
• Description: Self-diagnostics error: optional RAM [XXXX]: Detailed error code
• Causes: Turn the main switch off and on. Replace the RAM DIMM. Replace the controller board.

• Code: 835
• Description: Self-diagnostics error: Centronics interface [XXXX]: Detailed error code
• Causes: Turn the main switch off and on. Check the connection between the Centronics connector and loop-back connector. Reconnect the loop-back connector. Replace the controller.

• Code: 836
• Description: Self-diagnostics error: Font ROM (standard)
• Causes: Turn the main switch off and on. Replace the standard ROM-DIMM.

• Code: 838
• Description: Self-diagnostics error: Font ROM (clock generator)
• Causes: Replace the controller.

• Code: 850
• Description: Network interface error
• Causes: Turn the main switch off and on. Replace the controller.

• Code: 851
• Description: IEEE1394 interface error
• Causes: Turn the main switch off and on. Replace the IEEE1394 interface board. Replace the controller.