Advertisements I have two S3's in the same room. Both get their input from the same main cable and they've been working fine for years. This morning one of them showed "searching for signal" on all but one HD channel (ABC HD). I did a hard reboot after which it showed no signal on ANY HD channels. Same after a soft reboot. The other Tivo worked just fine. After half an hour or so the first Tivo was receiving every channel except NBC. I played with it a while, changing channels and disconnecting and reconnecting the cable and now it seems to be okay, but the fact is I really haven't changed anything. One minute the unit was not getting any signal (while the other one was) and half an hour later it's fine. Any thoughts on what might cause this? Assuming the incoming signal from Cablevision was actually good, is this in any way indicative of a failing unit? Thanks in advance.