Also important to notice: Sometimes you get a stuck screen, but the printer is not actually "bricked" a reboot (or two) sometimes also works. If you have tried rebooting and that did not help, it's time for different measures. If you have developer mode set to on, it's always good to see whether or not you can still log into the printer (not for the fainthearted). If rebooting doesn't fix it, contact support.