Plotters
Base currently owns two HP T520 plotters: Richard, a 36" printer, and Isaac, a 24" printer.
Printing
Richard should show up automatically when trying to print (if using Windows or Linux with CUPS and Avahi). If not, try manually adding IP 10.48.1.84. Richard has a management webpage.
Details
Richard
Issac
Isaac has been purchased by Filip for spare parts, he did not have a motherboard (previous owner sent it to HP and never got it back), and was used for repair or Richard.
F to pay respects.
Repair
Before trying any repair on your own, contact Filip for guidance. It's HP.
After being crowned Certified HP-authorized personnel, Filip managed to obtain a service manual[1]. If it wants some code for resetting, it's there.