We have 9 TV’s 2 have XiD-C boxes one upstairs 1 down, 3 have the larger black boxes, 1 is the big Main box. 3 have Roku sticks. All TVs work fine except the TVs with XiD-C boxes. These either freeze up or break up, some channels worse than others. A tech was out said we needed an amplifier, after installing that he noticed the line to the house was bad. He then had a new line replaced. Everything was fine for 2 weeks now the XiD-C boxes are acting up again????? I reset everything still same issue. Any ideas.