Hi. This error is normally caused by a communication error between the computer/network and the printer
This is what HP suggests49.XXXX PRINTER ERRORTo continue turn off then on1. Press CANCEL JOB to clear the print job from the printer memory.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 tothe 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 PC.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 eachdevice.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 computer.12. If the error persists, replace the firmware DIMM.13. Replace the formatter and calibrate the printer. See Calibrate now.