My fridge freezer is not working. Display looked OK but no noise out of unit and freezer & fridge both not cooling. switched off power for a minute and then back on. Display shows everything up and then goes blank except for one seg. on the freezer temp. display which now just flashes permenantly ! Looks as if the fridge is working (but not displayed) as I can hear compressor and it's cooling but freezer is still defrosting and the display still shows nothing but this one flashing segment.