I recently moved to a new house that already had a satellite dish
installed, so I bought a refurbished set top box to pick up the free
channels.
When I set it up, the set top box reported no satellite signal.

Is there a way of testing whether the connection to the dish from the
wall socket is OK using a multimeter?
I know that the dish may need to be adjusted to point in the right
direction, but first of all I just want to know if the dish / co-axial
connections are all OK.

Many thanks,
Rick