System Error Codes
Application/RIP/Driver settings
Type of output files this application, RIP or driver is generating
Some sample files that are representative of what the customer is using
Operating System
Method of connection to the printer
A description of the normal flow when the issue occurs and the typical frequency of occurrence (i.e. once every hour when sending non stop several files, each of them with multiple copies)
With this information, the environment can be replicated in order to try and find workarounds. This is also the information that will be needed at the GBU to investigate and fix the root cause of this issue once it is escalated.
Hardware related SE79:04
Hardware is, by far, the least likely cause of a 79:04 system error. Replacing hardware components does not normally fix the issue and increases the total turn around time in finding a workable solution.
In some cases, a failure in a component in the printer’s electronics may cause a 79:04 system error, since the printer’s electronics are involved in the execution of the firmware and the processing of jobs. It needs to be noted, however, that hardware failures in the electronics tend to produce specific system errors that point directly to the component that is failing.
Some HW causes that could be behind a 79:04 error are:
Defective clusters in the Hard Disk drive. If these clusters are used to execute the firmware or to process a job, they may produce a 79:04. It needs to be noted however, that most 79:04 errors that are resolved by an HDD replacement are in fact, data related 79:04 that could have been solved more efficiently and quickly following the steps in Section 3.
Defective memory segments. If the RAM memory has some defective segments, a 79:04 may occur when these segments are used.
Intermittent defects in the electronic components that are involved in the processing of a job: Carriage PCA, Trailing cable, Formatter and Print Mech. This is a highly unlikely cause, since defects in these components will produce subsystem specific errors.
Symptoms
There’s no single set of symptoms behind hardware related 79:04 system errors. The most usual ones, however are:
79:04 during start up. Rebooting the printer may or may not solve the problem
79:04 while processing or printing a job. Rebooting the printer and printing the same job does not always produce the error.
Solutions and workarounds
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:
1Reboot the printer in Diagnostics Boot mode and execute the service tests to validate the functionality of all the electronics components
HP Designjet T Series — Service Manual |