Powering Up Problem

I’m having a problem with a PC I have just recently built from completely new components. The problem only occurred after the machine was transported from where I had originally fired it up, with no problems (bios only at this time), to my home. The problem consists of the PC powering up for a split second then cutting itself off. When I say a split second I mean a split second, we’re talking a half rotation of the fans. There is no visual output, no beeping, nothing. As far as I can see the motherboard (ASUS A8N-E 939) is getting sufficient power as the green LED is coming on. Also I am certain all the power switches are connected into the right place on the motherboard. I’m using a AMD64 3500, some corsair memory, a nVidia 6600GT, and a WD Raptor SATA drive - all of which I’m sure are compatible. Has anyone got any ideas on what this problem may be? Its highly stressful knowing this thing worked a couple days ago . Thanks.

 

Couple of seconds power up..... Is the case and or ps new also??
May be an PS problem

justathought

 

The power supply and the case are also new, thanks for your interest petalumacacraigslist. I'll try another power supply and get back to you, although I doubt it'll be the problem.

 

Check for a short in the Mobo.

 

The condition you mention is indeed a power supply problem.
But, that doesn't mean the PSU is bad, only that it's seeing an overload on power-up and it's shutting down to protect itself and the electronics.

Check all your connections and then reduce the load by unplugging any case fans, etc.

It's possible the PSU is bad, but just moving the 'puter from one place to another won't cause that. It could however cause a short someplace.

When building a new system today, you should be installing at least a 400+ watt PSU. With anything less, you're just asking for trouble.

Good Luck,
DrRoms

 

Try a cmos reset or remove the cmos battery for 5 secs