I have a THD (TCD652160), bought used on eBay that I cannot get to receive all digital channels. I'm hoping it's not a TiVo problem, indicating I bought a lemon. The CableCARD *seems* to be working but only one channel in the 300-range (non-HD digital) is working and only half of the channels in the 400 range (the HD channels) work. The missing channels all show that the signal is there and the tuning is locked -- it gives all the appearances that the CC has tuned the signal and is working properly, all except there's no picture and sound. My other THDs receive these channels just fine. If I understand a CableCARD (CC), it's much like a set top box in that it decodes the signal and hands the audio/video off to the receiver, in this case, a TiVo DVR. So why would it decode and display only some channels and not all the channels I should be receiving? Is there *anything* in the DVR itself that could cause this problem? Bent pins in the CC slot? Burned out components? I had them check the permissions for receiving these channels and they assured me that the CC is configured to receive all the channels I'm not getting. I'm on my second CC now and it receives the same channels as the first CC did. Interestingly, over the weekend, with their tech support on the line, I swapped in a known good CC from one of my other THD boxes and the suspect THD worked properly after re-doing the pairing (unless my recollection is bad!). That's why I picked up a different CC from the Cable Co office yesterday. But it works no better than the one I returned. (Note that this caused crashing on the good THD from which I borrowed the CC once I put the CC back in!) So I'm very curious if this could possibly be a THD DVR problem and not a CC problem.