Hey There, I am Anna Carter. Sometimes, your printer may go offline and you may wonder why my hp printer is offline. This must be happening due to certain issues. The issues must be related to a loose connection or disconnection between the printer and the PC. In regards to the loose connection, it might have occurred when you could have pulled the printer. This could have loosened up the power wire of the printer. Hence, remove the plug of the printer and put it back tightly into the socket. If the problem is not resolved then, tighten the connection between the printer and the PC.