Lexmark T420 User Reference page 100

Secondary error code light sequences (continued)
Load/
Ready/ Toner Remove
Data Low Paper
Paper Press
Jam Error Continue
100
Printer status/Message
Deficient printer memory
Insufficient defrag memory
External network adapter (ENA)
connection lost
Invalid network code
Defective flash
Unformatted flash
Network interface error
Flash full
Too many flash options
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