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.
Cause Solution
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. Restarting the printer may or may
not solve the problem
●
79:04 while processing or printing a job. Restarting the
printer and printing the same job does not always
produce the error.
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:
1. Restart the printer in Diagnostics Boot mode and execute
the service tests to validate the functionality of all the
electronics components
◦
Execute the troubleshooting for “data related”
system errors, refer to page 3, Data related
SE79:04
2. Replace the memory
3. Replace the HDD
4. Escalate the issue before replacing any additional parts.
Troubleshooting based on symptoms
This section will describe which troubleshooting steps to perform for a 79:04 system error based on the
symptoms of the issue. 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.
32 Chapter 1 Troubleshooting ENWW
Troubleshooting
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