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故障现象:按下电源开关后,待机红灯亮,不能“二次”开机。第一次检修:拆机后,观察机内元器件无任何“雷击”后的表面痕迹。待机灯和CPU的供电均由开关电源输出的5V-1提供,则开关电源工作应正常。因图纸中IC及BG晶体管无参考电压标出,只能实测后分析。先测CPU有关脚电压(CPU为LC
Symptom: Press the power switch, the standby red light, can not be “twice” boot. The first overhaul: disassemble, observe the machine components without any “lightning” after the surface traces. Standby lights and CPU power supply by the switching power supply 5V-1 provide, the switching power supply should work properly. IC and BG transistors due to the drawings without reference voltage marked, only after the actual analysis. First test CPU about the foot voltage (CPU is LC