故障现象1 主机通电后,显示器无光标,系统死机,但重复通电若干次,偶尔能够启动,系统运行正常。分析与检修出现死机这类故障,应该首先从电源开始检查。通过对换另一电源试之故障现象不再出现,这说明是电源故障。但是用万用表检查原电源+5V、-5V、+12V、-12V,四档电源的电压值结果正常。因此,上述故障很可能是POWER-GOOD信号失效所致。因为电源 Symptom 1 After the main unit is powered on, the monitor has no cursor and the system crashes, but the power supply is repeated several times and can be started occasionally. The system is operating normally. Analysis and overhaul such failures occur, you should first start from the power check. By switching to another power supply failure of the test no longer appear, indicating that the power failure. However, with a multimeter to check the original power supply +5 V, -5V, +12 V, -12V, fourth gear power voltage value is normal. Therefore, the above failure is likely due to the POWER-GOOD signal failure. Because of the power