If you are getting the message "no signal" this would indicate that there is a problem with the signal from your dish into your box. Even without a card inserted into a SkyDigibox, if there is a signal, you will always get Sky Guide and the free channels.
Try powering off your box, remove the card, check carefully the cables, especially the connection to the dish, reapply the power and then when asked to insert your card you should then be able to see (for example) channel/SNWS">Sky News on 501 and the BBC News channel on 503.
Once you can see any channel, reinsert your card. This should, after about one minute, give you the channels you expect, such as 103, 104 and 105.
If you continue to get "No signal", you dish may have been misaligned, or there may be a fault with the cables and connectors, or a problem with the Digibox. You can see the signal strength by pressing SERVICES, then 4-SYSTEM SETUP and 6-SIGNAL STRENGTH.
farida Johnston : Did you explain you were using a communal aerial system? If you did not then how do you think they might know?
In any case, if you are using a communal aerial system it is your responsibility to ascertain whether it is working properly or not. You were warned about the charge beforehand -- the obvious thing would have been to check with neighbours who use the shared satellitedish.
My SkyHD+ box keeps picture breakup on certain channels . I was asked if I wanted to join a sky protection package when my warranty runs out, I got in touch with sky which stated that the warranty has run out so I should get an engineer to call. Since then I have had a second hand HD+ on demand box! is it easy to set up oneself or do I require a TV installer to connect to sky. I've been told that each box needs to be calibrated to a viewing card. Any help would be much appreciated.
rose: Should the problem mentioned be referring to a Skybox?, (standard / Sky+ or Sky+HD) then try placing it in standby for a minute or so before disconnecting it from the mains supply, waiting for a further minute or so before reconnecting it again and allowing it to go through the searching for listings procedure.
Should though a Sky box not be involved, please state the type of device you are referring to, i.e: Freeview or Freesat.