New budget build won't start

[WalterK]

First, the pertinent parts:

Antec EarthWatts Green EA-380D Green 380W Continuous power ATX12V v2.3 / EPS12V 80 PLUS BRONZE Certified Active PFC Power Supply

ASUS P5G41T-M LX LGA 775 Intel G41 Micro ATX Intel Motherboard

Intel Pentium E5500 2.8GHz LGA 775 Dual-Core Desktop Processor BX80571E5500

Kingston 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1066 (PC3 8500) Dual Channel Kit Desktop Memory Model KVR1066D3N7K2/4G

The above parts for the latest PC just arrived and I'm guessing the PSU is bad. As always, I did an out-of-case build, and here is what I've done: 1) Installed the CPU, heatsink and fan, and connected the CPU fan to the proper motherboard header; 2) Installed the RAM; 3) Connected the PSU to the main header on the motherboard, as well as the four pin CPU header; 4) Jumped the power pins to start the system.

What happens is this--the PSU and the CPU fans both start, then both of them stop completely after a couple of seconds. The green LED on the motherboard stays on as long as the power supply is in the on position.

My thinking is that if there was something wrong with the motherboard or with the CPU, those failures shouldn't affect the power supply and cause it to shut down, should they? I don't have a spare power supply to test with...so any ideas other than getting one and seeing if it works? Thanks in advance!

Update: Disconnecting the PSU from the motherboard, and using a paper clip to jump off the power supply works, and the PSU fan spins continuously. Not sure what that tells me...maybe something to do with the CPU connector from the power supply? The power supply has 2 CPU connectors coming off of it; one at least starts the system for a few seconds, the other does not.

[glc]

Try keeping the power pins jumped for just a bit longer.

Look on your bar code sticker on the mobo box, that processor requires bios 0601 or newer.

[WalterK]

Thanks for the response, George.

Keeping the pins jumped on the power button header didn't cause anything to happen differently. Both the PSU and and the CPU fan started, then stopped as they had been.

I'm not sure what I'm looking for on the motherboard box. I see the serial number, part number, UPC code, EAN code, something called Check Number, with the number 8000 under the bar code under Check Number. Don't see anything to do with the BIOS version.

I notice that when the fans spin then shut off that I cannot simply turn the power supply off and back on and then jump the pins again. Instead, to do so, I have to remove and replace the 4 pin 12V ATX connector before I can restart.

I appreciate the help. What's the next step?

Another Update: I was frustrated enough to use a PSU that was in a working computer. I got a good boot with that PSU, so I'm guessing the Antec is defective. The BIOS was either 0603 or 0604.

[glc]

That is quite unusual to get a DOA Antec - but I guess it happens.