I am having an issue with my Tivo HD, which has not been modified in any way. The problem is that on three occasions in the past two months I have had to reset the box to fix a no audio problem. I do hear the Tivo beeps but there is no audio on live or recorded shows. The Tivo is connected to the TV via an HDMI cable, and there is also a digital audio connection to the AVR and the sound is affected through both of these connections. I have it connected this way so that I can either just listen though the TV via the HDMI, or use the surround sound system. The last couple of times this happened I switched between the two to make sure the audio was affected through both connections. I have the issue right now but am not rebooting in case there is something else I can do. Is this an issue others have seen or perhaps the Tivo is failing? I have lifetime service on this Tivo, but I believe that only applies to the Tivo service and not the hardware. Thanks!