Printers' capabilities offline when they have a tough-line connection to the PC retaining the document. The printer wishes a mode of speaking with the PC so it could examine and switch from the hard-disk to the print feature. Printer offline HP. To know more about it so you need to visit on this link: HP Printer Is Offline. The printer itself does no longer have a difficult-disk and cannot do without a way of seeing your record. Bringing a printer on-line indicates it is able to print files without a direct connection to the PC. The report is transferred through the far off connection even as the printer prints and reads.