Replacement XiP-D cable box will not connect

Recently returned a Motorola MTR700 because it would not stay powered on for anything longer than a second or two.  Gentleman at the Comcast store said that now we could get the XiP-D box as a replacement. Ok.  So I get the box back home and try to install it and gives me the error about there being a problem try tightening all connections, yada yada and restart.  Did all that still no connection.  Then I thought maybe it was just because of the multiple splitters the signal had to go through to reach this tv.  Moved the box to the closest least split section of the line (1 split with line going to cable modem and 1 going to our main box a Motorola DCH70 and that splitter was installed by a Comcast tech.).  Still no connection trying either line coming from that first splitter.  Then after some googling I saw something about needing a MoCA PoE filter for these boxes.  Fine. Got a filter and installed it and still no connection with any of the previous connection variations.  Now before I exchange this for another box or call customer service , my question is does the XiP-D work in a home with the DCH70 as the main box or does that have to be upgrade as well to an X1 box?  Other than this box being broken that's the only other thing I can think of.