Hi All, I've got a MagicTV 3600 here which is picking up no signal. Are there any settings hidden in there which may cause the problem?

- My TiVo and TV work fine off the same aerial plug
- There doesn't appear to be any obvious internal or external damage to the aerial socket on the unit. 
- It's quite possible a user here has been messing with settings. 

I've done a 'factory reset', but is there any easy way of completely reinstalling the software in case it's software related?

Thanks in advance.