I have the above fridge freezer (2006). It’s making a loud electrical buzzing sound, the light isn’t coming on when the door is opened and the digital display is blank. It doesn’t sound like the compressor is switching on at all.
Most things can be repaired on an APM 6855 it is a case of as it is ten years old is it worth putting the money it would cost to repair towards a new fridge freezer.