Help required. Are you connecting the outer screen on your wall plates? everytime I connect the outer screen the normal uhf tv is very bad, lots of noise, snow. Have a large aerial in the loft. Am in a strong signal area, very small aerial indoors works well, so large one in loft should be ok. Need to eliminate faulty loftbox. Have checked all outlets and no shorts. screen clamped and inner wire in hole no shorts. checked all f connectors. Puzzled. Not added sky into the mix or LNB's until I know domestic TV is working. Disconnected all other sockets - Now Have 1 socket and 1 tv connected. Still bad Looking for ideas? clues? anyone users already installed?