Appendix A: How to troubleshoot SE 79:04
Conditions where the problem occurs and conditions prior to the first occurrence of the problem.
The result of the previous 7 steps
The printer information pages (either printed and faxed or obtained through the Embedded Web Server)
The System Error detailed information (it can be obtained by pressing CANCEL + Down)
Information on the workflow:
–Operating System
–Application
–Driver
–Settings in the driver and the application
–Settings in the printer
–Connection method and settings
The original file along with the information on how to reproduce the issue
The printer logs. In order to obtain the printer logs, check the corresponding appendix.. See Appendix C: Obtaining printer logs on page
Random 79:04 during continuous printing
The error does not happen with a single job. It happens randomly during continuous printing, normally while the printer is managing a heavy load (printing a project or in a reprographics environment).
This type of error is caused either by memory leaks or by concurrence issues in the printer’s firmware. They normally happen in non common environments where these memory leaks or concurrence issues that have not been detected during qualification have occurred. These issues cause the printer to crash at a completely random moment during printing, and are not associated to a specific job.
Because of this, troubleshooting these issues is normally quite complex.
1Reboot the printer twice (after the first reboot, the printer will show the 79:04 system error again, since the printer will attempt to reprint the last job in the queue. If the issue continues occurring randomly, continue troubleshooting
2If you are using an HP driver, update the driver to the latest version
3Upgrade the printer’s firmware. Even if the currently installed firmware version is the latest one,
4Try the following changes in the workflow:
a Change the Print Language option in the Front Panel from “Automatic” (which is the default setting) to the language that is being printed (PS, HP- GL/2, …)
b Queue = OFF
c Start Printing = After processing
d For PS SKUs, try changing the encoding setting (“Automatic” by default) to Binary or ASCII
HP Designjet T Series — Service Manual |