Toshiba Printer Offline is caused by the printer's lack of network access. However, there are some other elements that influence the inaccuracy. There's a good chance that the paper got trapped in the print queue, causing the printer to display an offline error notice and go offline from online. Alternatively, check that your USB cable is correctly connected to your computer and printer. There should be no loose connections or breaks between the Toshiba printer and your system. Both ends of the USB should be tightly linked.