For example: To observe the surface of the controller and display any scars, any plugs off, lead is disconnected, the circuit board components whether charred, broken legs, pins and so encounter.

• 例如：观察控制器及显示屏表面有无伤痕，插头有无脱落，引线是否断开，电路板的元器件是否出现烧焦、断脚、引脚相碰等情况。