If the fault appears to be in the circuit board itself, a simple swap of circuit board and heat-sink can be facilitated by the lossening of 4 small cap screw and wire for wire transferal.

• 如果故障是发生在电路板上的话，只要拧松四个小帽螺钉，用一根电线把线路板和散热器作简单的交换就可以了?