How to troubleshoot the 79:04 System Error 39
Troubleshooting
4. In order to narrow the scope of the issue, try the following:
a. Disable the queue
b. Disable any unused network protocols
c. Disable SNMP and WebServices (if they are available in the printer)
d. Disable “Sleep mode” from the Service Utilities menu
e. Delete any Paper Presets that you may have uploaded or created using the printer Spectropho-
tometer.
5. Restart the printer in Diagnostics Boot Mode and perform the “Electronics test”. If an electronic com-
ponent is identified as faulty, replace it.
6. Restart the printer in Diagnostics Boot Mode and Reset the EEROM. If the issue is solved by this, this
is a data related 79:04 system error and you should follow the guidelines for this type error on page
3, Data related SE79:04.
7. Format the Hard Disk drive. To do so, you will need to start the printer normally, enter the Service
Utilities menu and then the Secure Disk Erase option. Set the Erase method to “Fast Erase” and then
perform the disk erase process. This will take 45-75 minutes and will erase all user information from
the disk, resolving any issue caused by corrupt data. After the erase process, a firmware update will
be required. If this solves the issue, this is a data related 79:04 system error and you should follow
the guidelines for this type of 79:04 on page 3, Data related SE79:04.
8. Try to identify the combination of settings or actions that led to the system error and try to reach the
same result with a different combination. Escalate the issue to fix the original problem.
9. If none of the previous steps could solve the issue, escalate it with the following information:
• Unit information: S/N, P/N, accessories
• Conditions where the problem occurs and conditions prior to the first occurrence of the prob-
lem
• The result of the previous 8 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)
• The printer logs.
Front panel displays 79:04 while printing
A. While printing a single job
The error happens after a single job is sent. It’s easy to identify which job that has produced the error,
since every time that this same job is sent, the error is replicated.
1. Reboot 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, which is the one that caused the
issue)
2. If you are using an HP driver, update the driver to the latest version
3. Upgrade the printer’s firmware. Even if the currently installed firmware version is the latest one, re-
install it. Send the job using different print settings. The following ones can be helpful:
a. Try sending the job without selecting a media profile in the driver
b. Try changing the Image Quality settings
c. If you are using the HP-GL/2 driver, try the option “Send job as bitmap”
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