Two True boxes 1 dish

[Rob5060]

We have had a True box via satellite for a few years That box was purchased outright 

 

 About a year  ago we decided to subscribe to True and had a new box fitted  The engineer said it could share the same satellite dish with a separate cable

 

All worked no problem but recently if the original box is not switched on the second TV starts to break up and even sometimes say there is no signal

 

Anybody understand   I thought being 2 separate boxes wired independently they should work alone

[CharlieH]

They should, thats exactly what we have, 2 boxes 1 dish.

Call them out to put it right.