I have a series 1 philips under subscription with a 9th tee network card. This was purchased used from Just Deals. BTW, I don't think I will ever buy anything from JD again, but thats another story. The problem is the unit is losing audio at random intervals.The problem seems intermittent. Sometimes it shows up a few days after restart, other times it takes around 10 days. When the problem does show up, I see a blue screen on the tivo that says to the effect that there is no audio, check cable connections, try changing the channel, or reset etc. When I go to look at live TV I get the same error, no audio. Also when I look at recently recorded programs, only the first few seconds of the program are recorded, and I quickly get the end of recording save or delete prompt. The only way I know to bring back the audio is to unplug the power for a restart. At first I thought My selection of audio quality was affecting it somehow, but now it seems to do it no matter what I do with the menu settings. I do have the Instant Cake cd for this tivo but have not used it yet. Does anyone think I have a bad tivo or bad hard drive ? It doesn't make any strange sounds and boots up ok with out problems.