HP Designjet Printer Series - System Error 79:03 and 79:04 During Start up or Start a Print Job

Introduction

The System error 79:04 is a generic firmware error (equivalent to a blue screen in Windows). The printer displays this error when an unknown exception occurs that cannot be pointed to by any specific subsystem of the printer. Since this is a generic error, it has multiple causes. This document describes the probable cause behind a system error 79:04 and recommends the most efficient troubleshooting steps to resolve the error. Although 79:04 system errors can be caused by a hardware malfunction, the vast majority of 79:04 system errors are software or firmware issues. In these cases, the issue can only be solved by determining the root cause and implementing a solution. The solution usually involves correctly configuring a selection, updating the printer’s firmware/software, or fixing an error in the code.

Symptoms

There is no single set of symptoms behind hardware related 79:04 system errors. The most usual ones are:

• 79:04 during start up
• 79:04 start a printing a job

Solutions and workaround:

In the following procedure perform each step as it appears in the list and only move on to the next step once you are sure the 79:04 error has not been cleared:

If non-HP ink is being used, it is recommended to replace it with HP ink and printheads:

1. Check the printer's supply status:
   Extract the Service Plot (when possible) or view the information on front panel. If any cartridges or printheads are out of warranty or the printheads show more than 100% of use, replace these before going to the next step.
2. Check the printer firmware version and if necessary, update it.
   If System Error 79:03 and 79:04 persist, please contact the HP support. For contact information, go to Contact HP.