To fix the Hp printer in error state, simply reboot the device and it will temporarily help in getting the error away. In another case, the user must initiate with turning off the printer and then turning it on after a few seconds. On the HP printer, you can do it by simply pressing the button. Once the device is on, open the device manager, click on the view menu and then choose “show hidden device.” Further, expand ports and right-click on the printer port.