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Hi , I`m Jack , i will be helping you todayCan you please send me a reply when you are ready to proceed ?
In any case you would need to be near your equipment
Seems to me like you have 2 separate problems here ;
Smarcast and "no signal" which are not related
The smarcast app basically turns your phone into a remote control but the no signal is the first problem you should be dealing with using the TV's and cable box remote .
Forget the app for now and get the cable box working and for that I would need you to be there so if you can reach me from home later on we could work on this.