维修部：维修各行业电路板，机加工设备系统，主板，控制器，电源，变频器，PLC触摸屏等。
Maintenance department: maintenance industries circuit boards, machine equipment system, main board, controller, power supply, frequency converter, PLC and touch screen.
文中从三个方面给出了一些主板的故障事例，分析了故障发生的原因，并介绍了常用的维修方法。
This paper gives a number of examples of motherboard failures from three aspects, analyzes the reasons for the fault, and describes the commonly used maintenance methods.
答：如果损坏程度大则不能维修，由于home键和主板一对一匹配而无法单个更换，只能整机更换。
Answer: if the degree of damage is not maintained, because the home key and the motherboard one to one match and not a single replacement, the whole machine can be replaced.
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