im quite new to this so apologies for my naivety. recently my skybox f5s has started to lose 85% of channels in the the evening time (around 8 oclock) all the channels like sky 1, sky living, sky sports 1,2,3,4,5 etc.. have stopped working and have been replaced by "invalid channel search again", however channels like comedy central x, dave ja vu and bt sports 1 and 2 are still working perfectly. even stranger is that in the morning and throughout the day the box will be working fine with all channels behaving as the should. its very strange and i cannot think why this is happening. any help would be greatly received. thanks.