随着中小学信息技术课的开设和现代教育技术的应用,中小学拥有的计算机越来越多,计算机的损坏和维修问题也日渐显现出来。从整体上看,计算机的板卡集成度较高、可靠性好、不易损坏,而工作于高电压、大电流且主要由分立元件构成的电源盒的故障率相对较高。由于计算机属积木式结 With the establishment of information technology courses in primary and secondary schools and the application of modern educational technology, more and more computers are in primary and secondary schools, and the problems of computer damage and maintenance are gradually emerging. On the whole, the computer’s board has a high degree of integration, reliability, and is not easily damaged. However, the failure rate of the power box, which is mainly composed of discrete components, operates at high voltage and current, and is relatively high. Because the computer is a building block