My series 3 Tivo hard drive died. I installed a new one. Everything seemed to go fine until Tivo couldn't communicate with Comcast. After over an hour, the phone tech gave up and said he'd call back. I called Tivo who called Comcast. Comcast said I needed a technician to visit. Later another phone tech called and said things looked good to him and didn't know why I couldn't get up and running. Wonder what the tech will find on his visit.