Hardware-related SE 79:04
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 turnaround 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.
However, hardware failures in the electronics tend to produce specific system errors that point directly
to the component that is failing.
Some hardware causes that could be behind a 79:04 error are as follows.
●
Defective clusters on the hard disk. If these clusters are used to execute the firmware or to process
a job, they may produce a 79:04 error. However, most 79:04 errors that are solved by a hard
disk replacement are in fact, data-related 79:04 errors that could have been solved more
efficiently and quickly by following the recommendations for such an error.
●
Defective memory segments. If the RAM memory has some defective segments, a 79:04 error 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 PrintMech PCA. This is a highly unlikely cause, since
defects in these components will produce subsystem-specific errors.
Cause
There’s no single set of symptoms behind hardware-related 79:04 system errors. However, there are
two relatively common causes.
●
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.
Solution
In the following procedure, perform each step as it appears in the list and move on to the next step only
when 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 check the functionality
of all the electronics components.
2. Check for data-related system errors: see
Data-related SE 79:04 on page 30.
3. Replace the memory.
4. Replace the hard disk drive.
5. 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.
ENWW
How to troubleshoot the 79:04 system error
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