My box has gone pear shaped also !
No program synopsis, channel unavailable, no signal, broken series links etc...
My box states there is only one feed and not two.
When I swap the sat cables around I have no feeds at all
cable 1 > input 1 = good signal
cable 1 > input 2 = no signal
cable 2 > input 1 or 2 = no signal
so possibly cable 2 not working and input 2 not working.
This seems to have happened over the last 6 weeks sometime and have done the usual things to restart / force update etc..with no success.