the first thing you should look for is there any errors coming up on the screen .. normaly if there is an error the display screen will go blank and a little green segment will flash .
if so take a note of what segment is flashing - ie the segment will be part of the number 8 .
you can try and override the error by pressing the top right and top left button for 10 seconds ..
if this doesnt work - or if you are not getting any errors you would be best to call an engineer .
or call this guy - ALLY 07407 734 204 - HE GIVES ADVICE ON SAMSUNG FRIDGE FREEZER ON ALL SORTS OF WEB FORUMS ..
lorna
January 2014