71.02.4A Error Code

[cmalt]

My printer is suddenly displaying the 71.02.4A error code.  I have done a lot of research online, including this community, trying to correct such.  The ink cartridges were low, so I replaced them with genuine HP ink cartridges.  I have reset the printer several times by unplugging the power source while the printer is on, unplugging the power source from the wall, waiting 60 seconds, holding the power button down for 30 seconds to remove any excess power, and using a can of compressed air to clean the printer.  I have even done a factory reset on the printer.  The error code is still displaying.  

This printer is barely 3 years old, I believe.  Please advise how I can correct such.  

[Nal_NR]

Hi @cmalt,

Welcome to the HP Support Community. 

I'd like to help!

Fabulous analysis. Spectacular diagnosis of the issue before posting. Kudos to you for that. You've done a remarkable job performing the steps.

This might require one on one interaction to fix the issue.

I've sent you a private message with further instructions. In order to access your private messages, click the private message icon on the upper right corner of your HP Support Community profile, next to your profile Name or simply click on this link.

If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution button, that'll help us and others see that we've got the answers!

[Johnharper241]

HP OfficeJet Pro 8020 error code 71.02. 4A HERE IS THE FIX: It's a cartridge issue.

[cmalt]

This error came up before the cartridges were changed.  I figured it was due to them being low/empty.