Probably it's too late to answer this question but I found the solution. In the motherboard of the printer, there is a padlock icon with 3 jumpers. Move the jumper cover to the left (leaving the right one jumper uncovered), this will unlock your printer and reset the printer to factory status. Turn on your printer and confirm is unlocked. Turn off the printer and move the jumpers to how they were before. Turn on your printer now printer is reset to factory default.