Since getting my Robo R1+, the usb port had to be wiggled when the cable was plugged. I started getting a comm 5 was in use error when trying to run the printer. I finally printed a USB guard with hope that it would maybe fix the problem, but I guess it made it worse. Now it says that there was an error loading the usb port. I also noticed the cable getting warm... any idea what this is? Replace the cable or is there something wrong with the port? I generally get it to work after a while, but today it just wasn't working.