I have a sky dish at the bach.  When we can't be bothered unhooking the MySky box and taking it away with us we just watch Freeview with a Topfield TF4000Fi.   I can't get it to work all of a sudden.    The signal shows a healthy level but zero quality, and the yellow LED that normally shows on the TF as well as the green LED is absent.  When I unplug the coax from the dish, the level drops to zero. I've tried various combinations of 10750/11300 /22 kHz, etc. A search for channels always gets no hits.

I know that they replaced the LNB a couple of years ago but the TF has worked since then.  I always have needed to set the Sky box up when we come up and change it back again, I presume because the dish at home has a different LNB to the bach.

How hard can it be?  Is there a newbies step-by-step guide to setting this up?

TIA
R