HP Designjet T7200 - Front panel displays 79:04 while printing; A. While printing a single job

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The System Error detailed information (it can be obtained by pressing CANCEL + Down)
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The printer logs
Front panel displays 79:04 while printing
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A. While printing a single job
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B. Random 79:04 during continuous 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. Restart the printer twice (after the first restart, 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. Update the printer’s firmware. Even if the currently installed firmware version is the latest one, reinstall
it. Send the job using different print settings. The following ones can be helpful:
a. Try sending the job without selecting a paper preset 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”
d. If you are using the PS driver, try using the HP-GL/2 driver instead
e. If you are using the PS driver from an Adobe application (or any other application that can handle
PS), try changing the application’s print settings so that the PS is generated as Raster.
4. Try the following Front Panel settings:
a. Change the Print Language option in the Front Panel from “Automatic” (which is the default
setting) to the language that is being printed (PS, HP-GL/2, …)
b. Queue = OFF
c. Start Printing = After processing
d. For PS SKUs, try changing the encoding setting (“Automatic” by default) to Binary or ASCII
5. If you are using a third-party application that does not print through the HP driver, try modifying the
printing workflow by:
a. Using an HP driver
b. Changing the settings in the application’s printing dialog
6. If you are using an accessory Jetdirect card, try using the internal network connector or USB (if
available).
7. Escalate the issue, providing the following information.
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Unit information: S/N, P/N, accessories
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Conditions where the problem occurs and conditions prior to the first occurrence of the problem
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The results of the previous steps
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The printer information pages (either printed and faxed or obtained through the Embedded Web
Server)
ENWW How to troubleshoot the 79:04 system error 33