Advertisements Just fyi guys. I'm pretty sure that's the problem as several channels (I'm assuming low traffic channels) are black on my series 3 tivo but play just fine on comcast's HD box. This makes sense because Comcast recently added several HD channels (all of which are NOT sdv). Oh well, at least I'm not losing any channels I actually watched...let's just hope it continues that way...(one example is channel 116 ESPN News...another is Fit TV). Oh and, Tivo, PLEASE HURRY on that usb dongle. Thanks.