How to Fix HP Printer Error 79: A Complete Troubleshooting Guide

HP printers are known for their reliability, but like all technology, they can sometimes encounter issues. One of the most common problems users face is HP Printer Error 79. If you’re seeing this error on your printer’s display panel, don’t worry—this blog will help you understand what it is, why it happens, and how to fix Printer Error 79 quickly and easily.

What is HP Printer Error 79?

HP Printer Error 79 is such a common firmware-related error. It can be the result of a command or job that the printer can’t process — often due to corrupted print jobs, outdated firmware, or network issues. This error message stops your HP printer from printing, or printing any more at all, so that’s really annoying for the users.

Common Causes of HP Printer Error 79

Identifying the origin of the error is necessary in order to explore the right solution. The following are some common causes of  Error 79:

Print jobs that are corrupt or incompatible

Network communication issues

Outdated printer firmware

Faulty DIMMs or EIO cards

Hardware or accessory that isn’t functioning correctly

How to Fix Error 79

Restart the Printer

First and the easiest way to resolve Printer Error 79 is to turn off your printer and wait for 30 seconds, then turn on the printer. This might clear up some of the glitches or stuck print tasks.

Disconnect All Network Cables

Disconnect the network cable from the back of your printer briefly. Then power on the printer without connecting it to any devices. If it comes up alright, the problem most likely is a corrupt print job or network setting.

Update Printer Firmware

Outdated firmware is the major reason behind Error 79. Navigate to the HP official support webpage and click on “ Software and firmware.” Install and download the latest updated firmware. Instructions on how to install it are available below.How to Fix HP Printer Error 79: A Complete Troubleshooting GuideCommon Causes of Error 79

Corrupt or incompatible print jobs

Outdated or corrupted printer firmware

Network communication conflicts

Faulty DIMM (memory) or third-party add-ons

Incorrect printer driver or print spooler issues

🛠️ Step-by-Step Guide to Fix HP Printer Error 79

1. Power Cycle the Printer

Turn the printer off.

Unplug it from the wall and wait for 30 seconds.

Plug it back in and turn the printer on.

This clears temporary memory glitches and resets internal hardware.

2. Cancel All Print Jobs

If the error reappears after restarting:

Go to the computer(s) connected to the printer.

Cancel all pending print jobs in the print queue.

Reboot both the printer and the computer.

3. Update Printer Firmware

Outdated firmware is a common cause of Error 79.

Visit the HP Support Website

Search your printer model.

Download and install the latest firmware.

Use HP Smart or Web JetAdmin for network printers to simplify this process.

4. Disconnect from the Network

Disconnect the printer from the network or USB cable.

Restart the printer.

If it boots up without Error 79, the problem might be with a network print job.

Reconnect devices one-by-one to isolate the problem source.

5. Remove Additional Hardware

If you’ve recently added memory (DIMMs) or other accessories:

Turn off the printer.

Remove third-party add-ons.

Power it back on.

Faulty or incompatible hardware can trigger system errors.

6. Reset the Printer to Factory Settings

Use this as a last resort:

On most HP LaserJet printers, go to:

Menu > Administration > Restore Factory Defaults

Follow the on-screen instructions.

⚠️ This will erase all custom settings.

📞 When to Contact HP Support

If none of the above steps work, it’s time to contact HP customer support. There may be deeper hardware or firmware issues that require professional service or replacement parts.

🧠 Final Tips to Avoid Error 79 in the Future

Keep printer firmware updated regularly

Avoid printing from unsupported or outdated applications

Use only genuine HP accessories and print drivers

Regularly clear print queues on shared networks

📌 Conclusion

HP Printer Error 79 is usually a sign of software or hardware miscommunication. By following the troubleshooting steps in this guide, you can usually resolve the issue without professional help. Regular maintenance and software updates go a long way in preventing such errors.

Have questions or still stuck? Leave a comment below, and we’ll be happy to