Computer will not start

First, make sure the CPU's P4 power supply connector is secure.

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Good Luck!

i got he same problem on a friend 5150. what i did was to remove the mobo cmos battery with the power cable unpluged. then i plug the power cord again and the computer booted ok. i unpluged it again and place a new battery on the mobo cmos battery and the system continued booting ok. the only problem i have now is that the boot is stopped due to a keyboard failure since it seems the default bios settings does not use usb port.

hi there i was just wondering did you find a solution to this problem, i have a dell 5150 doing the same thing. motherboard light is green but the switch wont power it on. the fan etc are not on either only sign of life seems to be the green light on the motherboard. any help would be greatly appreciated.

I wanted to find out if any of you ever resolved this problem. I believe I am having a very similar issue -- I've had my PC for 3 years, and until today it's been working just fine. But, when I tried to boot it up today it had absolutely NO signs of life (no fans spinning, no front panel lights on, etc) except for the lonely green LED light on the motherboard. I tried disconnecting all of the peripherals, disconnecting and reconnecting all cables from the power supply, replacing my RAM, but still the same result.

Does anyone have any ideas what I should try next? I have:
* Asus K8V SE Deluxe
* AMD Athlon 64 3400+
* 2 x Corsair XMS3200/1024MB/400Mhz
* ULTRA X-Connect? 500W ATX PSU

Thanks,
Kostya K.