I believe that it is a series one unit. I bought the Directv/Tivo unit when they first came out and have a lifetime subscription. The problem has become progressively worse in that 1) the unit takes forever to respond to inputs from the remote, 2) pixelation and sputtering/stuttering of video, 3) as of a few minutes ago, just black screen and no response, 4) rebooted or cleared everything per prompts which took over one hour and appears to only have made things worse, etc.... What the heck is going on and what, if anything is the solution? Please help. I need to be able to have an ample supply of Kim Possible on reserve for my six-year old to avoid withdrawal symptoms. Thanks.