I have a PC with an Aopen (S661FXM) System board build on it. And I have been using it for quite while now. Recently I found something strange happenned to my PC. This is what cause all the problems: Each when I tried to swith on my PC by pressing the power switch button, there's nothing happen. Unless I have to unplung my power cable from the power supply and re-plung in the power cabble and it will work. Sometimes the machine restart itself. Can anyone help me with this? Thanks! RK