HP Officejet Pro 8610 (Print System Error)

A hard reset will sometimes fix the problem, or tell you what the problem actually is.

The video below shows how to do it:

https://youtu.be/bJfme227fnQ

The video shows you how to get into the hidden service menu to do a semi-full reset. 

It requires you to take an ink cartridge out so you can use a hidden system button.