cancel
Showing results for 
Search instead for 
Did you mean: 
Annriette
New member
1 0 0 0
Flag Post
HP Recommended
Designjet T770 (Hard Disk Version)

I replaced an empty printhead, but the printhead replacement kept failing. The new printhead was again replaced, and it seemed to work, but then machine kept giving a 79:03 error whenever tried to print. After following a few troubleshooting guides I recalibrated the printheads, and then got a error message indicating that a diffrent printhead (that was working previously and was installed 2 months ago) needed replacing. 

 

I then did a diagnostics test and during the Carriage Assembly Test after removing the printheads (as instructed at that point) the machine gave the error message: ERROR_FIRMWARE

 

At this point I restarted and updated to the newest firmware on the HP Website with a USB. After the firmware was installed and the machine restarted the error message now showed that the printhead replacement was unsuccessfull.

 

Please assist!

 

Who Me Too'd this topic
† 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