Comp boots and then turns off in like 3 seconds

[Starcraftologist]

I have an Enlight 7237 and a Abit KT7A with Tbird 1.2. The power supply is a sparkle 250 watter. I know amd recommends at least 250 for over 1 gig. The machine boots up and immediately shuts itself down. Awhile back it had this problem, i turned it on a few time and it ran fine on this same power supply for like a week. Now it's doing it again, refusing to boot. All I have are 250 watters, I tried a few, all boot and off in 3 seconds or so. Any explanations? Do I need a new power supply?

 

[MasterHoss]

Ouch--even though you have a great 250W ps...you definately need to get a 300W ps!! Running an AMD chip @ 1.2GHz with a 250 is not a good idea. If that's not causing your weird problems, is your computer beeping during the POST?? If so, you can always look in your Abit manual and cross-reference the beep to what the hell's going on.

 

[Joemonkey]

i bet my lunch the problem is you do not have the processor fan hooked into the FAN1 socket of the motherboard... the KT7A has a failsafe that if it does not detect a CPU fan plugged into the FAN1 socket, it auto-shuts off

if you update your BIOS, you can turn this feature off, but make sure your CPU fan is spinning first.

 

[hovenas]

FAN 1 Header? Consult manual and see magic...

Actually, get more than 300w. Proceed to 430 or so. The last thing you want to worry about is juice when you clock/install...

 

[Kaieye]

I'm running my t-bird AXIA chip at 1.35 gigahertz using a Sparkle 250 watt power supply running five ide devices and a tv tuner card with a MSI turbo raid mb. I'm not having any issues with stability...

 

[lotust]

Kaieye dam U ...Lol all that on a 250w.. that amazeing man.

 

[Starcraftologist]

hey guys, thanks for the help it was the problem with the fan header saving my cpu that abit implanted. yup it works fine now. i've built so many computers and this is the first time i hit something so dumb...