I have an hp laser jet color printer 4650n which is giving me a code of 49.4C02 service error

This error codes indicates that one of the toner cartridges you have installed does not contain a valid chip on it. If you recently changed a cartridge that is the likely culprit.

Any of these error codes (51.20 51.21 51.22 51.23) points to a failure with one of the laser scanner assemblies on the HP Color LaserJet 4610 an 4650 series. To solve these error codes, replace the corresponding laser scanner. Sometimes when the laser scanner fails you will also hear loud noises (often higher-pitched noises like screeching sounds); the noises can be another sign that the laser scanner needs replacing.


51.XY
PRINTER ERROR
For help press
alternates with
51.XY
PRINTER ERROR
A printer error has occurred.
X Description
1 beam detect error
2 laser error
Y Description
0 no color / black
1 Press to continue.
2 Turn the printer off and then on.
3 Reseat the connectors between the
laser/scanner and DC controller PCA
(J1009 - J1012).
4 Replace the defective laser/scanner
assembly. Calibrate the printer after
replacing the laser/scanner.

Lots of suggestions from the HP site: http://h30499.www3.hp.com/t5/Multifunction-and-All-in-One/HP-Color-LaserJet-CM6040-MFP-58-04-Error-message-error-code-not/td-p/4821025#.VVCSS5I4nTY

You have to print the first side then take those prints and put them back into the paper tray to print the second side (Manual Duplex). If this were a DN model it would have built in automatic duplexing and you cound select "duplex printing" from your print setup screen and the printer would print both sides automatically.

i need to reset the maintenance kit

There is either a small piece of paper in your paper input section or you have a paper sensor going bad.

The problem is usually caused by printing a PDF file with fonts/page size/ page formating errors which will cause the printer to display the 49.3048 error. The only way to use the printer is to POR or recycle the power and delete the print job from the server or spooling device and cancel it on the printer before the offending command is issued to the printer again. You can try updating the firmware to the latest version 46.140.5 from the HP website. MIke L.

Hi 123sha:
49.XXXX
PRINTER ERROR
To continue
turn off then on
A critical firmware error has
occurred that caused the
processor on the formatter
to abort operation. This type
of error can be caused by
invalid print commands,
corrupt data, or invalid
operations. In some cases,
electrical noise in the cable
can corrupt data during
transmission to the printer.
Other causes include poorquality
parallel cables, poorconnections,
or home-grown
programs. On rare
occasions, the formatter is at
fault, which is usually
indicated by a 79 Service
Error.
1 Press CANCEL JOB to
clear the print job from
the printer memory.
2 Turn the printer off and
then on.
3 Try printing a job from a
different software
program. If the job
prints, go back to the
first program and try
printing a different file. If
the message appears
only with a certain
software program or
print job, contact the
software vendor for
assistance.
4 If the message persists
with different software
programs and print jobs,
disconnect all of the
cables to the printer that
connect it to the network
or computer.
5 Turn the printer off.
6 Remove all memory
DIMMs or third-party
DIMMs from the printer.
7 Remove all EIO devices
from the printer.
8 Turn the printer on.
9 If the error no longer
exists, install each
DIMM and EIO device
one at a time, making
sure to turn the printer
off and on again as you
install each device.
10 Replace a DIMM or EIO
device if you determine
that it causes the error.
Try new network card
pdouglasss