Here are the solutions that you can take to resolve HP Z6100 Printer Error 79-04. However, if you are facing any difficulty in resolving the problem then always seek help from the technical support team. 

• First of all, check the status for the supply or you can the information on the digital panel. Then you need to check the ink cartridges and the related things to see if you need to replace them or fix any issue. Also, check if the ink cartridges that are being used are authentic for the HP printer.

If you have verified the above steps and it is not the reason behind the problem then there are a couple of steps that you can follow. Follow the complete guideline to resolveHP Z6100 Printer Error 79-04.

• The first thing that you need to do is to download the repair tool on your computer.
• Once the file is downloaded go to the location and then double-click to open the file. Now, you shall install the user account control and then run the program. Then select the yes option.
• Then you will see a screen on the preliminary launch. Then untick the checkbox for repairing tool that will start automatic scanning and then select the install option to start the complete process. 
• As soon as you install the repairing tool it will proceed for downloading the updates required for the software and firmware. 
• Now, a preliminary check the system for any fault and then repair the problem. 
• Once the scan is complete then check the PC and then click on the start button on the PC.

Once the repair will be completed the repair tool will automatically detect the error. You can restart the printer and the computer and then check if the error is resolved or not.