Showing results for 
Search instead for 
Did you mean: 
Get help with Large Format Printers, with direct access to all Latex Knowledge Center · Ask anything · Find anything · Share anything at HP LKC
New member
1 0 0 0
Message 1 of 3
Flag Post

error 79:04

HP Recommended
designjet t 770 hd /44"
Microsoft Windows 7 (64-bit)

buon giorno  sono nuovo di questo forun ma lo seguo da tonto tempo ho un problema con  designjet t 770 hd /44"

con errore 79:04  ho cambiato tanti pezzi ma niente da fare vorrei da voi una vostro consulto quardo spesso forum di devid zeus. distinti saluti diego

20,511 14,864 325 972
Message 2 of 3
Flag Post
HP Recommended

Thank you for visiting our English HP Support Forum. We are only able to reply to posts written in English. To insure a quick response it would be advisable to post your question in English. The following links are here to assist you if you prefer to post in the following Language Forum.

German: HP Kundenforum
Spanish: Foro de usuarios de HP
French: Forum des utilisateurs
Portuguese: Fórum dos usuários HP
Chinese: 惠普个人客户支持论坛
Korean: HP 지식커뮤니티

Thank you for your understanding

I work on behalf of HP
Was this reply helpful? Yes No
Level 7
634 609 35 85
Message 3 of 3
Flag Post
HP Recommended


The first thing is to make sure that you have the latest firmware on the printer
Then check if the problem is at the printer or the computer.

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:

==> Clear all information that has been introduced by the user using the standard tools available in the printer:

==> Delete all jobs from the queue (from the Front Panel or the EWS)

==> Reset to factory defaults to clear the user’s configurations and calibrations


==> 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 Printer Utility)

==> If step 1 did not resolve the issue, you can use Service Tools to clear additional information that could be causing the issue:

1.Start the printer in Diagnostics Boot Mode

2.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:

1.Access the Service Utilities Menu

2.In the Secure Disk Wipe menu, set the Sanitize level to “Unsecure mode”

3.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 backup partition to allow the unit to start up. This firmware version is very old.

4.The firmware in the printer should be upgraded to the latest official version as soon as the printer has restarted. After step “c”, any 79:04 which is caused by corrupt data in the printer will be solved





Was this reply helpful? Yes No
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation