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例1.一台自装586多媒体兼容机,除电源选用台湾产二手机外,其他皆为全新产品。该兼容机在冬季停用一段时间后,便出现不能开启的故障。故障现象为:电源和硬盘指示灯亮一下便全部熄灭,此时,测量电源各输出端电压皆为0V。过一段时间后有时也能开启。从这种故障现象看,初步分析是电源电路板上某元器件接触不良造成的。打开电源机壳,晃动几下电路板上的元器件,未能发现有虚焊或脱焊现象,用放大镜反复查找亦是如此。笔者不死心,将怀疑有虚焊的脚重新焊一遍,开机故障排除。但第二天开机时又
Example 1. A self-installed 586 multimedia compatible machine, in addition to the power used in Taiwan second-hand machines, the other are all new products. The compatibilizer was disabled for a period of time in winter, and then failed to turn on. Symptom: power and hard disk indicator light will be all off, this time, the measurement of the power supply voltage of all outputs are 0V. After some time can sometimes open. From this failure phenomenon, the initial analysis is a result of poor contact of a component on the power circuit board. Open the power chassis, shaking a few pieces of the circuit board components, failed to find a Weld or de-soldering phenomenon, repeated with a magnifying glass as well. I do not give up, will doubt Weld feet re-welding again, boot troubleshooting. But the next day boot again