I had similar problems with my Philips TiVo unit several months ago. I was able to eliminate the 950 as the culprit. In my case the problem was related to the software version running in the TiVo box- although it happened more often if the unit was hot. Since I was upgraded to version 3.1.1c the problem has disappeared. Search http://www.tivocommunity.com/tivo-vb, there are plenty of posts related to this issue. Hope this helps, certainly was frustrating.