Hello, the board was working, all LEDs were on, the fan was working, the screen displayed. I sold the motherboard with Asus FX505dy packing in anti-static bubble wrap and original box from ASUS. After 4 days, the buyer has just opened it and the board does not work. It heats up in the place of the heat sink, the keyboard blinks and the power LED is on. I am asking for suggestions on what causes it does not work.