My 3 yr old Tivo HDXL has lost the ability to connect to the internet. My network runs from a cable modem, through an Apple airport extreme router, then a 10/100 switch, and finally by cable from the switch to the ethernet port on my HDXL. This has been stable for 3 years. I also have a Roamio that connects to this switch. Both Tivos connect to the internet via DHCP. My cable provider (TWC) changed the channel lineups and both Tivo's wanted me to run Guided Setup again. I did the Roamio with no problems. However, the HDXL can't see the internet, and gives me an N24 error if I connect via DHCP, or says it can't see the network adapter if I have it assign a static IP. I have recycled the switch and the Tivo several times, and still can't connect from the HDXL. I have no problem connecting from the Roamio, so I suspect something is amiss in my HDXL, but I cannot figure out what to do next. Suggestions?