HP Color LaserJet 2840 User Manual

ProblemCauseSolution
Copies are blank. The sealing tape might not
have been removed from the
print cartridges.Remove the print cartridges
from the device, pull out the
sealing tape, and reinstall the
print cartridges.
The original might have been
loaded incorrectly.In the ADF, load the original
with the narrow side forward
and the side to be scanned
facing up.
On the flatbed scanner, make
sure that the original document
is placed face-down with the
upper-left corner of the
document at the lower-right...

Fax problems
This section helps you identify and resolve fax problems.
Problems receiving faxes
Use the table in this section to solve problems that might occur when receiving faxes.
Note
You must use the fax cord that came with the device in order to ensure that the device
functions correctly.
ProblemCauseSolution
The device cannot receive
faxes from an extension
telephone.The extension-telephone
setting might be disabled.See Making an extension
telephone available to receive
faxes for instructions...

ProblemCauseSolution
Incoming fax calls are not
being answered by the device.The answer mode might be set
to Manual.If the answer mode is set to
Manual, the device does not
answer calls. You have to start
the fax-receiving process
manually. See 
Setting the
answer mode for more
information.
The rings-to-answer setting
might not be set correctly.Check the rings-to-answer
setting for your configuration.
See 
Changing the rings-to-
answer setting to determine
which setting you need.
The answer-ring pattern...

ProblemCauseSolution
Incoming fax calls are not
being answered by the device.A voice-messaging service
might be interfering with the
device as it attempts to answer
calls.Do one of the following:
●Disable the messaging
service.
●Get a telephone line that is
dedicated to fax calls.
●Set the device answer
mode to Manual. In
manual mode, you must
start the fax-receive
process yourself. See
Setting the answer mode
for more information.
●Leave the device set to
automatic mode and lower
the rings-to-answer...

ProblemCauseSolution
Received faxes are too light or
are printing only on half of the
page.The device ran out of toner
while printing a fax.The device stores the most
recently printed faxes. (The
amount of memory that is
available determines the actual
number of faxes stored for
reprinting.) As soon as
possible, replace the print
cartridge, and then reprint the
fax. See 
Reprinting a fax.
The fax that was sent was too
light.Contact the sender and have
the sender resend the fax after
altering the...

ProblemCauseSolution
Faxes stop during sending.The fax machine to which you
are sending might be
malfunctioning.Try sending to another fax
machine.
Your telephone line might not
be working.Do one of the following:
●Turn up the volume on the
device, and then press
S
TART FAX on the control
panel. If you hear a dial
tone, the telephone line is
working.
●Disconnect the device
from the jack in the wall,
and then connect a
telephone to the jack. Try
to make a telephone call to
verify that the telephone
line...

ProblemCauseSolution
Faxes that you send are not
arriving at the receiving fax
machine.The receiving fax machine
might be off or might have an
error condition, such as being
out of paper.Call the recipient to verify that
the fax machine is on and
ready to receive faxes.
The originals might be
incorrectly loaded.Verify that the original
documents are correctly loaded
into the ADF input tray or
flatbed scanner. See 
Loading
trays
A fax might be in memory
because it is waiting to redial a
busy number, other...

ProblemCauseSolution
Print is skewed.The media input tray might be
overloaded.Remove some of the media
from the input tray.
The media guides might be
incorrectly set, broken, or
missing.Verify that the guides are not
adjusted too tightly or too
loosely against the paper.
Check for broken or missing
guides, and replace them if
necessary.
The media might not meet
HP specifications.Use media that meets
HP specifications. See 
Media
specifications.
Pages are curled or wrinkled.The media might not meet
HP...

Performance problems
ProblemCauseSolution
Faxes are transmitting or being
received very slowly.The fax might be very complex,
such as one with many graphics.Complex faxes take longer to
be sent or received. Breaking
longer faxes into multiple jobs
and decreasing the resolution
can increase the transmission
speed.
The receiving fax machine
might have a slow modem
speed.The device only sends the fax
at the fastest modem speed
that the receiving fax machine
can accept.
The resolution at which the fax
was...

Memory card problems
This section helps you identify and resolve memory card-related problems.
Note
For help with control-panel error messages while printing from a memory card, see Control
panel messages.
Missing or wrong files
Use the table in this section to solve problems with memory-card files.
ProblemCauseSolution
Device cannot detect files on
the memory card.The memory card might be
missing or inserted incorrectly.Verify that the memory card is
inserted correctly. See
Inserting a memory card.
The...