One of our two AEG SCS51810S1 integrated fridge freezers has died overnight with no prior warning. Plug fuse is ok but no light or refrigeration and no response to ‘power on’ (temperature) button. The two year warranty ran out 6 weeks ago so I’m keen to find a fix. The only possible cause I can think of is that we have only defrosted it once in 2 years, but then it’s supposed to be a low frost model. I can’t even work out how to get to the control panel, so any tips on easy things to check would be much appreciated.