Lexmark 4500-00 Series Service Manual page 87

Network error
Indicates an error in the network circuitry. Replace the controller
card assembly.
Primary Code
Ready/Data
Toner Low
Load/
Remove Paper
Paper Jam
Error
Press Continue
Tertiary Codes
(972)
(971)
(970)
Secondary Code
Ready/Data
Toner Low
Load/
Remove Paper
Paper Jam
Error
Press Continue
(974)
(973)
Unrecognizable network port (975).
4500–E220/E321/E323
Ready/Data
Toner Low
Load/
Remove Paper
Paper Jam
Error
Press Continue
Flash parts failed
while programming
port (979).
Bad checksum while
programming port (978).
Unrecoverable software error in
network port (975).
Diagnostic information
2-57