HP OfficeJet Pro L7400 User Manual

•Device takes a long time to print
•
Blank or partial page printed
•
Something on the page is missing or incorrect
•
Placement of the text or graphics is wrong
•
The device prints half a page, then ejects the paper
The device shuts down unexpectedly
Check the power and power connections
Make sure the device is connected firmly to a functioning alternating current (AC)
power outlet. For voltage requirements, see 
Electrical specifications.
Error message appears on control-panel display
A non-recoverable...

Device does not accept printhead
Check the printhead latch
Make sure the printhead latch is properly closed.
Check the printhead
• Make sure the printhead is inserted into its correct color-coded slot. For more
information, see 
Replace the printheads.
• Remove the printhead, and check to make sure the orange protective caps have
been removed from the printhead.
Clean the printhead
Complete the printhead cleaning procedure. For more information, see 
Maintain the
printheads.
Turn off the device after...

Check the printhead
• Make sure the printhead is inserted into its correct color-coded slot. For more
information, see 
Replace the printheads.
• Remove the printhead, and check to make sure the orange protective caps have
been removed from the printhead.
Clean the printhead
Complete the printhead cleaning procedure. For more information, see 
Maintain the
printheads.
Turn off the device after removing the printhead
After removing the printhead, turn off the device, wait about 20 seconds, and turn it on...

Check the media size
• Content on a page might be cut off if the document size is larger than the media
that you are using.
• Make sure the media size selected in the printer driver match the size of media
loaded in the tray.
Check the margin settings
If the text or graphics are cut off at the edges of the page, make sure the margin
settings for the document do not exceed the printable area of your device. For more
information, see 
Set minimum margins.
Check the page-orientation setting
Make sure the...

Poor quality printouts
Check the printheads and ink cartridges
Print the print quality diagnostic page on a clean sheet of white paper. Evaluate any
problem areas, and perform the recommended actions. For more information, see
Print the print quality diagnostic page.
Check the paper quality
The paper might be too moist or too rough. Make sure the media meets HP
specifications, and try to print again. For more information, see 
Select print media.
Check the type of media loaded in the device
• Make sure...

Ink is smearing
Check the print settings
• When you print documents that use much ink, allow more time to dry before
handling the printouts. This is especially true for transparencies. In the printer
driver, select the Best print quality, and also increase the ink drying time and
reduce the ink saturation using the ink volume under the advanced features
(Windows) or ink features (Mac OS). However, note that decreasing ink saturation
might give printouts a washed-out quality.
• Color documents that have...

Wrong colors are printing
Check the print settings
Make sure Print in Grayscale is not selected in the printer driver. For information on
changing this setting, see 
Change print settings.
Check the printheads
Print the print quality diagnostic page on a clean sheet of white paper. Evaluate any
problem areas, and perform the recommended actions. For more information, see
Print the print quality diagnostic page.
Printout shows bleeding colors
Check the ink cartridges
Make sure ink cartridges have not been...

Optional Tray 2 cannot be inserted 
• Reinsert the tray. Make sure it is aligned with the device opening.
• Check for a paper jam. For more information, see 
Clear a jam in the device.
Another paper-feed problem is occurring
Media is not supported for the printer or tray
Use only media that is supported for the device and the tray being used. For more
information, see 
Understand specifications for supported media.
Media is not picked up from a tray
• Make sure media is loaded in the tray. For more...

Pages are skewing
• Make sure the media loaded in the trays is aligned to the paper guides. If needed,
pull out the trays from the device and reload the media properly, making sure that
the paper guides are properly aligned.
• Make sure the rear access panel or optional duplexer is properly installed.
• Load media into the device only when it is not printing.
Multiple pages are being picked up
• Fan the media before loading.
• Make sure the paper guides are set to the correct markings in the tray for...

Copies are blank
•Check the media
The media might not meet Hewlett-Packard media specifications (for example, the
media is too moist or too rough). See 
Select print media for more information.
•Check the settings
The contrast setting might be set too light. Use the Copy button on the control
panel to create darker copies.
Documents are missing or faded
•Check the media
The media might not meet Hewlett-Packard media specifications (for example, the
media is too moist or too rough). See 
Select print...