Lexmark 4039-1XX Manuale Utente

Diagnostic Aids

To run some of the printer diagnostic tests described in this chapter, 
you must put the printer in Diagnostics mode.

 To enter Diagnostics mode:

1. Turn the printer off. 

2. Press and hold the Ready and Return buttons. Then turn the 

printer on. The printer performs the Power-On Self Test. 

3. Release the buttons when [Performing Self Test] is displayed. 

4. You can exit Diagnostics mode without a POR by selecting 

[Reset Printer].