Hey There, I am Anna Carter. If your HP printer offline, don’t worry. It can be fixed easily if it is related to the USB cable that connects the printer with the PC. You need not have the technical know-how to fix this issue. To fix the problem, switch off both the printer and the PC. Remove the USB cable from the printer’s port and PC. Wait for a few minutes. Put the USB cable back into the printer and PC’s ports. Switch on both devices. Check whether they have got connected. On getting connected, your printer can be used.