Possible causes
Since the 79:04 system error is a generic error, the number of possible causes behind it is large. The
majority can be grouped, however, into the following groups.
Job-related SE 79:04
A specific print job that is not correctly formatted for the printer or that is not correctly processed by it
can trigger a 79:04 system error.
The incorrect format or processing can come from two sources:
●
Incorrect commands in the job itself: for example, a PS job with some commands that do not have
the correct PS format
●
Issues applying to the settings in the job
Cause
A system error 79:04 caused by a print job always has the same symptoms:
1. The job is received by the printer and starts to process.
2. In the middle of the processing, the printer stops and displays 79:04.
3. The printer displays the 79:04 system error again immediately after restart. This is because the
printer tries to reprint the job, which is pending in the queue, after restart.
4. After the second restart, the printer will start normally.
5. If the same job is sent again, it always produces a 79:04 system error.
These types of 79:04 system errors are normally caused by jobs that have been generated by third-
party applications (RIPs, third-party drivers, files exported by an application to PS, PDF, HP-GL/2, RTL,
or any other format supported by the printer). Jobs generated by HP drivers will not normally generate
79:04 system errors, since the output that our drivers generate is under control and has been designed
taking into consideration the characteristics of our printer’s language interpreters.
As an exception to this general rule, there are certain applications that can generate their own PS
code, such as Adobe PhotoShop, Adobe Illustrator, Adobe Acrobat, Corel Draw, Freehand and
QuarkXpress. When used with a PS driver, these applications generate the output PS themselves,
instead of using the driver’s rendering capabilities. This is known as PostScript pass-through. So, when
using an HP PostScript driver together with an application that has PS passthrough capabilities, the PS
code that comes into the printer has not been rendered by the HP driver, and, should the source file
contain any PS commands that are not correctly processed by the printer, a 79:04 system error could
occur even though an HP driver is being used.
Solution
When a job consistently generates a 79:04 system error, it is either because of a issue in the printer’s
firmware or because of a defect in the job itself (when it has been generated by third-party software). In
order to identify the cause and find out a solution, these issues should always be immediately escalated
to the GBU through the GCC.
ENWW
How to troubleshoot the 79:04 system error
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