Hello Ecollins,
Have you tried to reseat the Library control board( where you plug in the ethernet cable) on the TL4000. All you need to do is to loosen the screws and you can pull it out. I would power off the TL4000 and pull it out for 30 seconds and then reinsert it. Once that is done power it up and then try to access it again.
Please let us know if you have any other questions.