HP Color LaserJet 2840 User Manual

Control panel messageDescriptionRecommended action
Unsupported Memory CardThe memory card that you have inserted
is not a type that is supported.Insert a card that is supported. See
Inserting a memory card.
Critical error messages
Critical error messages can indicate some kind of failure. Cycling the power might fix the
problem. If a critical error persists, the device might require service.
Critical error messages
Control panel messageDescriptionRecommended action
50.x Fuser ErrorThe device has...

Control panel messageDescriptionRecommended action
52 Scanner ErrorThe device has experienced an internal
hardware error.Turn off the power by using the power
switch, wait at least 30 seconds, and
then turn on the power and wait for the
device to initialize.
If a surge protector is being used,
remove it. Plug the device directly into
the wall socket. Use the power switch to
turn the device on.
If the error persists, contact
HP Customer Care. See 
Service and
support or the support flyer that came in
the...

Control panel messageDescriptionRecommended action
Engine errorThe device has experienced an engine
error.Press ENTER to clear the message.
Turn off the power by using the power
switch, wait at least 30 seconds, and
then turn on the power and wait for the
device to initialize.
If a surge protector is being used,
remove it. Plug the device directly into
the wall socket. Use the power switch to
turn the device on.
If the error persists, contact
HP Customer Care. See 
Service and
support or the support...

Clearing jams
This section contains instructions for clearing jams from the device.
Media jams occur in the device
Occasionally, paper or other print media can become jammed during a print job. Some
causes include the following events:
●The input trays are loaded improperly or overfilled, or the media guides are not set
properly.
●Optional tray 2 is removed during a print job.
●The top cover is opened during a print job.
●Too many sheets have accumulated in an output area, or sheets are blocking an...

Loose toner might remain in the device after a jam. This problem typically resolves itself after
a few sheets have been printed.
To clear a media jam inside the device
CAUTIONMedia jams might result in loose toner on the page. If toner gets on your clothing, wipe the
toner off with a clean cloth, wash the items in cold water, and air dry. Using hot water or heat
from a dryer will set the toner in the fabric. If you get any toner on your hands, wash them in
cold water.
Do not use a sharp object, such as a...

5. When you have removed the jammed media, replace the image drum, and close the top
cover and the scanner assembly.
6. Return the fuser levers to their original upward position.
After clearing the media jam, you might need to turn the device off, and then turn it on again.
Note
When you add new media, remove all of the media from the input tray, straighten the stack
after adding the new media, place the stack in the tray, and then adjust the media guides.
To clear output area jams
If the media has...

If the jam is too far into the device to remove, you might have to remove the fuser. To do so,
complete the following steps.
1. Turn off the device, and then disconnect the power cable.
2. Rotate the locks on the fuser to the unlocked position.
3. Grasp the fuser handles and pull them to remove the fuser from the device.
CAUTIONThe parts on the internal surface of the fuser are very hot. To avoid burning yourself, do not
touch those parts.
4. Using both hands, slowly and steadily remove any print media...

To clear a media jam from the automatic document feeder (ADF)
1. Open the ADF cover.
NoteVerify that any shipping tape inside the ADF has been removed.
2. Remove the jam cleanout part. Using both hands, lift up on the two handles until the part
unsnaps. Rotate and lift out the cleanout part and set it aside.
3. Lifting the green lever, rotate the pick mechanism until it stays open.
4. Gently try to remove the page without tearing it. If you feel resistance, go to the next step.
5. Open the ADF lid and...

6. When the media is free, gently pull it out in the direction shown.
7. Close the lid to the flatbed scanner.
8. Lower the green lever.
9. Reinstall the cleanout part by inserting it as shown. Push down on the two tabs until the
part snaps into place. Install the cleanout part correctly, because future jamming might
occur if the cleanout part is not replaced correctly.
10. Close the ADF lid.
ENWWClearing jams233
 

Print problems
Print quality problems
Occasionally, you might encounter problems with print quality. The information in the
following sections helps you identify and resolve these issues.
Note
If you are having copy problems, see Copy problems.
Improving print quality
Use the print-quality settings to prevent print-quality problems.
Understanding print-quality settings
Print-quality settings affect how light or dark the print is on the page and the style in which
the graphics are printed. You can also...