How can I test whether PrintNode will work for me?

PrintNode have a free service-level offering. Go to their website, sign up for an account and then you can download their software to your computers and test it with your printers. You can test sending documents through PrintNode by uploading them within your PrintNode account on their website. If all is set up and working, then they should then print. If so, then this means that your printer is connected to PrintNode.