Data related SE79:04
HP Designjet printers have Hard Disks and non-volatile memories that contain data bases and files that
can be modified with user data. Some examples include:
• The printer’s queue
• The hard drive partitions that contain user jobs
• The data base that stores the printer settings
• The data base that stores accounting information
Some of this data is accessed by the printer at start up, and some others are accessed as needed.
If any of this fields contains corrupt data or data with characters or values that cannot be correctly
processed by the printer, a 79:04 system error may occur.
Cause Solution
There are two different types of symptoms for data related
79:04 system errors:
●
1. When the corrupt data is accessed during start
up:
a. The printer will display a 79:04 during the
start up process
b. Switching the printer off and on again will
not solve the issue. The printer will continue
displaying the 79:04 system error until the
corrupt data has been cleared through a
service procedure.
2. When the corrupt data is accessed during normal
printer operation:
a. The printer will start up normally
b. When the data is accessed (for example
while printing, while navigating the queue
or when changing some settings), the printer
displays a 79:04 system error
c. The printer can restart normally
d. When the data is accessed again (typically,
under the same conditions as in step “b”),
the 79:04 system error is displayed again.
Many times, data related 79:04 errors are resolved by means
of hardware intervention. Since data is stored in physical
components (RAM, EEROM and Hard Disk), replacing these
components with new ones which are empty usually solves the
problem. However, there are quicker and more effective
solutions to these types of errors:
1. Clear all information that has been introduced by the
user using the standard tools available in the printer:
a. Delete all jobs from the queue (from the Front Panel
or the EWS)
b. Reset to factory defaults to clear the user’s
configurations and calibrations
c. Delete any non-standard paper preset in the printer
(both the ones that have been created by the user
and the ones that have been installed as OMES
profiles through the EWS or the HP Utility)
2. If step 1 did not resolve the issue, you can use Service
Tools to clear additional information that could be
causing the issue:
a. Start the printer in Diagnostics Boot Mode
b. Perform an EEROM reset
3. If step 2 did not resolve the issue, it is possible to
completely clear the information on the Hard Disk and
the different EEROMs, leaving them in an equivalent
state to a new part:
a. Access the Service Utilities Menu
b. In the Secure Disk Wipe menu, set the Sanitize level
to “Unsecure mode”
c. Execute the Disk Wipe. This takes 45-75 minutes
and it will completely clear all partitions in the Hard
Disk which contain user data, including the partition
where the Operating System is installed. After the
disk wipe has completed, a backup firmware
version will automatically be installed from a
ENWW
How to troubleshoot the 79:04 system error
27
Troubleshooting
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