can't find my way to the fan for the fridge portion or the defrost heater/sensors. don't want to break anything in the process. samsung is too far in the past to have an online version of their service manual and i can't find an alternate source for one. problem: fridge not cold enough. found no voltage at motherboard to supply fans. so, stuck in defrost and can't get to parts to verify it is, in fact, the motherboard at fault.