Lexmark 4090-001 - Manual (Page 26)

Diagnostic Aids 3-1
4090-001
3. Diagnostic Aids
Use these diagnostic test procedures to verify a repair. There are
two ways to enter test procedures, each procedure will indicate the
method to use:
Procedure 1:
•
Press and hold the Paper Feed button while turning the
printer on. Release the button when the printer completes
POST.
Procedure 2:
•
Turn the printer off.
•
Use a two pin jumper on connector J6 as indicated, then turn
the printer on. The test begins when the power button is
pressed.
Note: You can use the two pin jumper on J7 to perform the tests.
Remember to return the jumper to J7 when the test is finished.
A two pin jumper is also available in the parts packet:
1367169 and 69G4188.