I am not sure if I am having the same issue but I did lose channel 13 (CBS, KOVR here in the Sacramento, CA area). I did rescan and the channel does not show up at all. I then disconnected the antenna from Tablo and connect it directly to the TV. Channel 13 comes in fine. I rebooted Tablo and reconnected. Tablo is still unable to pick up channel 13. Thoughts?
