Have a TOSHIBA 40AV700E that was operating via a Virgin box. Now moved to another flat. attached an aerial into the correct place, switched on the TV and only a blue screen displays. Pressed input selector and chose TV. executed Auto Scan for Channel, nothing found and system reverted to manual. tried many options including 00 I (UK option) and worked up and down to search for a channel, nothing found. The smaller TV this one is replacing operates fine on the aerial, but this TV will not..