Openview HD decoder has no channels to watch

We have an openview hd decoder. When we have a power failure in our area, which unfortunately happens alot - and the power comes back on, there is no channels to watch except channel 100. I have phoned on numerous occations for the problem to be solved and asked the call centre agents to help solve error code 04- you are not authorised to view this channel. I have done the reset of factory default settings and I redo the channel search. The call centre agents say it takes half hour to get channels again if I phone to report it. But in our case it takes 24 hours to have channels back on again. It is quite frustrating if you want to relax but cannot watch any of the channels and the call centre does not fix the problem. Is there a setting that needs to be changed to prevent this from happening? Can someone please investigte?