My $0.02

Some 主板 has a +5V standby 指示灯 and it should be on if the power supply is OK. Put a jumper on the power switch pins and remove it to simulate a power switch on if you suspect the 启动开关 is bad. Do you smell anything burning in your case? Test your power supply with a ATX power supply tester if you have one. Disconnect all devices like hard drive, DVD drive and PCI cards but not graphics card, CPU and RAM. Maybe the power supply is overloaded, power supply efficiency drop when they age. Shake your case to make sure there is no loose metal object that shorted your motherboard.

所有跟帖： 

• 谢谢您的详细解答和建议 我将朝这方向检查。 -bkl- ♂ (0 bytes) () 08/04/2010 postreply 16:51:24

• 问题已完满解决，十分感谢上述所有给予帮助的朋友们！ -bkl- ♂ (220 bytes) () 08/05/2010 postreply 15:25:46

• 应该 应该， 善哉， 善哉~(^o^)/~ -弓尒- ♂ (0 bytes) () 08/06/2010 postreply 05:49:10