Question about HP LaserJet 5550 Printer

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Trying to print a document error 49.4CO2 comes up. What does this mean?

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Hi as you will see I have cut this from the manual its not very specific

I hope this is of some help


Description Recommended action



To continue

turn off then on

None 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 poor quality parallel

cables, poor connections, or homegrown

applications. 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


2. Turn the printer off and then

back on.

3. Try printing a job from a

different software application.

If the job prints, go back to

the first application and try

printing a different file. If the

message appears only with a

certain software application or

print job, contact the software

vendor for assistance.

4. If the message persists with

different software applications

and print jobs, disconnect all

cables to the printer that

connect it to the network or


5. Turn the printer off.

6. Remove all memory DIMMs

or third-party DIMMs from the

printer. (Do not remove the

firmware DIMM in slot J1.)

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

back on as you install each


10. Replace a DIMM or EIO

device if you determine that it

causes the error.

11. Remember to reconnect all

cables that connect the

printer to the network or


12. If the error persists, replace

the firmware DIMM.

13. Replace the formatter and

calibrate the printer. See

Calibrate now (HP Color
LaserJet 5500 models only).

Posted on Mar 17, 2011


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from - FAQ

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