Lexmark 20D0000 - X 340 MFP B/W Laser, 340n - X B/W Laser, 342n - X MFP B/W Laser, X340, X340n Troubleshooting Manual

Lexmark™ X34x
Troubleshooting
Guide

Setup troubleshooting

Incorrect language appears on the
display

1 Press Menu.
2 Press or repeatedly until MACHINE

SETUP appears on the display.

3 Press .
4 Press or repeatedly until Language

appears on the display.

5 Press .
6 Press or repeatedly until the language

you want appears on the display.

7 Press .
8 Press Back repeatedly to return to the Ready

prompt.

Display is not lit

1 Turn off the MFP.
2 Disconnect the power supply cord from the wall

outlet, and then from the MFP.

3 Plug the cord all the way into the MFP.
4 Plug the cord into an electrical outlet that other

electrical devices have been using.

5 Turn on the MFP.

Software will not install

If the software does not launch automatically when
you insert the CD:

1 Close all open software applications.
2 Temporarily disable any anti–virus programs.
3 Double–click the My Computer icon.

4 For Windows XP, click Start to access the My

Computer icon.

5 Double–click the CD–ROM drive icon.
6 If necessary, double–click setup.exe.
7 Follow the instructions on the computer screen

to install the software.

Note: After installing the software, be sure

to re–enable your anti–virus
software.

If the MFP is connected to the computer through
another device:

1 Disconnect the USB cable from any other

device such as a USB hub or switch box.

2 Directly connect the cable to the MFP and the

computer.

Unable to connect over a network

Make sure you are using the correct cable, that it is
securely connected, and the network options are
properly configured.

For more information, see the User’s Guide.

Note: Connecting over a network is only

available on the X342n.

Removing and reinstalling the
drivers software

If the software is not functioning properly or a
communications error message appears, you may
need to remove and then reinstall the drivers
software. If the problems persist, follow these steps:

Note: Before reinstalling, shut down and

restart the computer.

1 Disconnect the USB cable from the computer.
2 From the desktop, click Start  Programs 

Lexmark  Lexmark Software Uninstall.

3 Follow the instructions on the computer screen

to remove the software.

4 Restart the computer.

5 If any Add New Hardware screens appear, click

Cancel.

6 Eject and reinsert the software CD.
7 Reconnect the USB cable to the computer.

If the software installation screen does not appear:

1 From the desktop, double-click My Computer.

For Windows XP, click Start to access the My

Computer icon.

2 Double-click the CD–ROM drive icon. If

necessary, double-click setup.exe.

3 When the MFP software installation screen

appears, click Install or Install Now.

4 Follow the instructions on the computer screen

to complete the installation.

Jams and misfeeds
troubleshooting

Avoiding Jams

Follow these tips to help prevent document and
paper jams.

• Use only recommended print materials.

• Do not mix paper types in the paper tray.

• Do not use creased, damp, or curled paper.

• Flex, fan, and straighten the paper before

loading.

• Make sure the adjustable paper guides are

positioned correctly.

• Make sure the recommended print side has the

correct orientation when loading paper in the
paper tray and the manual feeder.

• Do not overload the paper tray. The paper

should be below the max fill line on the inside
wall of the paper tray.

• Do not remove the paper from the tray while

printing.

Paper or specialty media misfeeds,
skews, or multiple sheets stick
together

• Load a smaller amount of paper into the MFP.

See the User’s Guide for more information
about maximum loading amounts for each
paper type.

• Use only new, unwrinkled paper.

• Prepare the stack of paper for loading by flexing

or fanning it back and forth. Straighten the
edges on a level surface

Paper does not feed

• Make sure paper is loaded correctly.

• Load a smaller amount of paper into the MFP.

Paper stacks poorly in the front
output slot

• Extend the paper stop.

• Do not let too much paper stack up in the front

output slot.

Envelopes skew or fail to feed
correctly

Insert a single envelope in the manual feeder, and
make sure the guides are against both sides of the
envelope.

Print and copy
troubleshooting

MFP does not print or respond

• Remove and reinstall the software. For more

information, see “Removing and reinstalling the
drivers software” on page 1.

• If you are scanning a document, wait until

scanning is complete before using the MFP.

• Restart the computer.

• Make sure the MFP is set as the default printer.

1 Click Start  Settings  Printers and

Faxes or Printers.

or

Click Start  Control Panel  Printers

and Other Hardware  Printers and
Faxes.

2 Double–click the Lexmark X340/X340n/

X342n icon.

3 Click Printer, and make sure no check mark

appears next to Pause Printing.

4 Make sure a check mark appears next to Set

As Default.

• Make sure the front cover is closed.

• Make sure the toner cartridge is installed

correctly. For more information, see the User’s
Guide.

• Disconnect the USB cable, and then reconnect

it.

Print speed is slow.

• Close all applications not in use.

• Minimize the number and size of graphics and

images in the document.

• If you are using the manual feeder, this is

normal.

Print quality
troubleshooting

Light or faded print

• You may be able to temporarily extend the toner

cartridge life by shaking the toner cartridge.

• Install a new toner cartridge. For more

information, see the User’s Guide.

• Only use new, dry paper.

• Make sure the front door is securely latched on

both sides.

• For copies, adjust the darkness settings by

pressing Darkness from the control panel.

• For prints, adjust the darkness settings from the

control panel menu:

1 From the control panel, press Menu.
2 Press or repeatedly until MACHINE

SETUP appears.

3 Press .
4 Press or repeatedly until Toner

Dark appears.

5 Press .
6 Press or repeatedly to adjust the

darkness settings.

7 Press to save the settings.
8 Press Back repeatedly to return to the

Ready prompt.

• For prints, adjust the darkness settings from the

control panel menu:

1 From the control panel, press Menu.
2 Press or repeatedly until MACHINE

SETUP appears.

3 Press .
4 Press or repeatedly until Toner

Dark appears.

5 Press .
6 Press or repeatedly to adjust the

darkness settings.

7 Press to save the settings.
8 Press Back repeatedly to return to the

Ready prompt.

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