Advertisements I had two TiVo HD's installed a couple weeks ago and had a similar issue. Prior to this I only had OOL Boost (no cable TV, had DirecTV). They put in a new cable from the box into the house, a new splitter and new drops to both TV's (the run to the modem was relatively recent so they left that alone). We had the usual issues (first TiVo worked fine, second had a bad card that they had to come back the next day, and of course overnight the TiVo that was working fine, stopped working altogether). The usual horror story ensued. I'll spare you the details. The bottom line is at the last moment when they were about to give up, the CV tech (who was excellent, by the way) noticed some power level issue (I think he was actually looking at the cable modem's SIGNAL screen). It was reading -13dBmV whereas the previous day it had been better (the TiVo's were reporting signal strength in the 40's). At that point the only cable he had not replaced was the one from the pole to the house (although he had checked it out and found nothing wrong with it) and so decided to give that a try. If things still did not work after that, then it could not have been an issue with the cables since everything would then have been brand new. You guessed it. As soon as he replaced that last drop, the power level on the cable modem screen went to 0dBmV (which he said was "perfect"), the signal strength on the TiVo's jumped into the high 90's and everything has worked fine since. The lesson is these cablecard TiVo's are VERY sensitive to signal level/strength issues. Things have got to be near perfect for things to work. Apparently other cable boxes are not nearly so finicky. Someday it would be nice if the TiVo boxes could be made more robust in this regard (better able to tolerate non-optimal signals). In the meantime, if you are having cablecard issues, make darned sure that as much of your cable infrastructure as possible is new. Don't assume that if you've had cable-company cable boxes working fine that a TiVo will necessarily work OK as well.