In the past few days, the screen blacks out with a message saying something like "E16 service currently scrambled" and this is true on all channels. It happened at least twice for the time between 6:00pm and 10:00pm and it stays like that for few minutes before all channels start to work again.

I tried to switch off box or reset but it didn't matter.

Any ideas why is this happening? or how can I fix it so it won't happen again?

Please help...