first time build, got a problem

[astyrrian]

So far I installed the video card, ram, mobo, processor, processor fan, and CPU. I power on my computer and everything comes on for only like a fourth of a second or less and everything powers off. I heard fans starting up for only a fourth of a second too but then they turned off.

I checked inside my case; the LED on the mobo is on. I switched power cables, checked the outlet, checked the psu switch. No problems there.

Any help is appreciated

- Jason

[fcoral]

Welcome to the Mech. First you need to post your full system specs including power supply brand and wattage then we can go from there and start helping you.

[astyrrian]

PSU: Antec SmartPower 2.0 SP-500 ATX12V 500W Power Supply
mobo: ASUS P5B Socket T (LGA 775) Intel P965 Express ATX Intel Motherboard
video card: eVGA 256-P2-N584-AR Geforce 7900GT KO 256MB GDDR3 PCI Express x16 Video Card
memory: CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM Unbuffered DDR2 800 (PC2 6400) Dual Channel Kit System Memory - Retail (both ram chips are in)
case: XOxide X-Purity
CPU: Intel Core 2 Duo E6400 Conroe 1066MHz FSB 2M shared L2 Cache LGA 775 Processor - Retail

One thing I should mention too.....when I powered on my keyboard lit up for a fourth of a second too.

Thanks a lot, appreciate it

- Jason

[Chazell29]

Originally Posted by astyrrian PSU: Antec SmartPower 2.0 SP-500 ATX12V 500W Power Supply mobo: ASUS P5B Socket T (LGA 775) Intel P965 Express ATX Intel Motherboard video card: eVGA 256-P2-N584-AR Geforce 7900GT KO 256MB GDDR3 PCI Express x16 Video Card memory: CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM Unbuffered DDR2 800 (PC2 6400) Dual Channel Kit System Memory - Retail (both ram chips are in) case: XOxide X-Purity CPU: Intel Core 2 Duo E6400 Conroe 1066MHz FSB 2M shared L2 Cache LGA 775 Processor - Retail

tell me what you think of that mobo, im going to be buying that one if i don't get a core 2 duo

[astyrrian]

Sure, once I get the thing working.

After searching online, I found one probable cause could be incorrect grounding. I screwed my bolts without using washers and they are touching the mobo. The mobo is on standoffs. Could this be the problem?

Thanks....

- Jason

[Chris_Rootes_Wizard]

Are you screwing ALL screws and stand off on ur mobo? if not, it could cause a shortcircuit? but i would like some one to back me up there.

[astyrrian]

The motherboard is sitting completely on all 6 standoffs and it is not touching the case. There is nothing inbetween the mobo and the screw. The bottom side of the screw head is touching the motherboard.

- Jason

[jayb1234]

Two of the more common problems to check for are is the square 4 pin CPU auxillary power connector plugged in and is the CPU heatsink locked down correctly.

[Cricket]

Try this. Let us know if it boots up when the motherboard is out of the case.

Cricket

[astyrrian]

Originally Posted by jayb1234 Two of the more common problems to check for are is the square 4 pin CPU auxillary power connector plugged in....

Hmm that may be it.....the only connections from the PSU I made were the 24 pin connector to the mobo, the PCI-Express connection to the video card, the power for the CPU fan, and the power for the PWR_FAN. I don't know or remember anything about a "4 pin CPU auxilary power connector".

Did I miss anything?

- Jason

[jayb1234]

See this picture.

The white square 2x2 connector on the upper right edge of the board is the one I was referring to.

[astyrrian]

Originally Posted by Cricket Try this. Let us know if it boots up when the motherboard is out of the case. Cricket

Ok after trying the entire mobo completely outside of the case and on cardboard, I'm still having the same problem. When I short the power to turn it on, the same problem is still there. Computer starts up along with the cpu and video card fan and then turns off completely half a second later. LED on mobo is still on the entire time.

- Jason

[Chris_Rootes_Wizard]

"The motherboard is sitting completely on all 6 standoffs and it is not touching the case. There is nothing inbetween the mobo and the screw. The bottom side of the screw head is touching the motherboard"

Okay, my thore out the window.

[Alaron]

You need to plug in the 2x2 square power connection at the top of the board.

[astyrrian]

Originally Posted by Alaron You need to plug in the 2x2 square power connection at the top of the board.

Thanks a ton that did the trick. Thought at first you guys were talking about the extra 4 pins on the mobo connection.

Everything boots up well and it displays ok. It also detects the processor and ram ok too. There is that slight problem of "Intel uCode error" but from what I found that's most likely fixed by updating the bios.

- Jason