Appendix A: How to troubleshoot SE 79:04

„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. In order to obtain the printer logs, check the corresponding appendix . See Appendix C: Obtaining printer logs on page 2-46.

Front panel displays 79:04 while printing

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.

1Reboot 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)

2If you are using an HP driver, update the driver to the latest version

3Upgrade 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” 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.

4Try 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

5If you are using a 3rd 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

6If you are using an accessory JetDirect card, try using the internal network connector or USB (if available).

7Escalate the issue, providing the following information: „ Unit information: S/N, P/N, accessories

HP Designjet T Series — Service Manual

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