T430s is a horrible design mess. there is a middle layer of magnesium and all the wires go through random holes drilled in this magnesium and if you go through the wrong hole you will never get it back together again. the fan is on the bottom of the motherboard on the bottom of the computer and it takes 12 disassembly steps and 12 reassembly steps to fix the most commonly broken part which is the fan. Die T430s, die!!!