Bad Board??

[KarmaKiller]

Hi all..
I'm still trying to get my main rig up and running, and am having a nightmare of a time.
I've got a new cpu now, new psu, new motherboard, which this is where I think the problem lies...
I have just the motherboard,cpu,hsf, and obviously the power supply hooked up.
The board powers on for 1 second, then shuts back off.
I have it out of the case on cardboard, and it still happens.

Ideas??
Bad board??

I really just want to check my sanity at this point...


TIA..

[gwinters]

It could be more than one bad part, or parts frying other parts. I've driven myself crazy trying to troubleshoot that before.

Have you tried it without CPU and memory? It should still POST and complain (beep) about the lack of a CPU.

Check the CMOS jumper? Have you tried the PSU in a different machine?

When this happens to me I just swap out parts, but I'm a nutcase that has three PCs...

[KarmaKiller]

Thanks for the suggestions.

No matter what the hardware config is, it does the same thing. Power on for a split second, then shut right off again.
I've tried with and without everything at this point, and still no changes...

I'm looking for a new board again I guess...

[carl33p]

Sounds like the symptoms of "grounding out" on something. (Short circuit)

But I wouldnt definetly test the new PSU in another PC before RMAing anything.

[mjolnir1134]

Is your CPU heatsink secured into your board all the way? I remember having my Pentium 4 heatsink leaning half-assed over the CPU and the system only powered on for just a few seconds.

[Mickwish]

Sounds like a short or a CPU heat issue. Remove board from case and place on non-conductive surface (cardboard is OK), then attach PSU, connect monitor (obviously vid card and RAM needs to be plugged in) and fire up. Should get a BIOS even with no drives connected. If not, reseat CPU agin and repeat....

Cheers
Mick

[KarmaKiller]

Thanks all for the suggestions...

I tried all of them, and had no luck still...

I'm still all ears....