TV Reception on Matrix machines
 

We recently switched from DirecTV to Comcast cable for our ten cardio machines using an mDta box which links a cable to each machine.

Initially, no problems. 40 channel package working fine on all machines.

After two weeks, problems: some machines, no signal. Others, local channels only, a few still with all channels.

Comcast was brought in - theirs system signals verified fine.

Has anyone encountered this and has a solution?

Many thanks!