Lexmark 640 User Manual

Internal print 
server

• Make sure the internal print server (also called an internal network adapter or INA) is 

securely connected to the printer system board.

• Make sure you are using the correct cable, that it is securely connected, and the 

network software is correctly set up.

See the drivers CD that shipped with the printer for more details.

Large capacity 
feeder (2000-sheet 
drawer)

See Solving 2000-sheet drawer problems.

Output expander

Make sure the connection between each output expander or the connection between the 
output expander and the printer is secure. If the output expander is listed on the menu 
settings page, but print media jams when it exits the printer and enters the output 
expander, it may not be properly installed. Reinstall each output expander.

Printer memory

Make sure printer memory is securely connected to the printer system board.

USB/Parallel 
interface

• Make sure the USB/parallel interface card is securely connected to the printer system 

board.

• Make sure you are using the correct cable and that it is securely connected.