Press Services
4
6
This should show a screen with the signal and the sat it's locked to or not locked to.
If it was working and now it isn't then best bet is a reboot first. Switch off leave for 30 seconds and switch on.
If that doesn't work then it's most likely in my experience that the sat dish may have moved sideways. Get the ladders out and with the above screen showing - Services - 4 then 6 get someone to watch wile you give the dish a tweak to the left a few degrees then back to the right if nothing.
The Dish should be pointing at around 28.8 degrees which is SSE or there abouts. The right elivation required should be evident by rust / newness visible on the dish mount assuming it's a pre-existing setup.
The above should get you back hopefully.
Usually the first indicator it's working is the background music comes on which is the same as you get when surfing the listings on Sky.
On some boxes even though you are showing locked to the sat stream 0002
and network 07d4 you need to switch the box on and off for it to start rec the channels. Others just kick straight in. You will see a signal bar, I've had a picture with as little as a third of the signal bar lit up on the screen although the worse the signals the more cloud / bush etc etc effects the viewing.
Hope this helps.
I learnt all I know from this site
http://homepage.ntlworld.com/de.sullivan/