fans spin for a second then nothing

[jimmymac]

anyone help with a friends problem?

Having spent over a day trying to solve this problem I gather it is a fairly common problem but it is DRIVING ME MAD!!!

From the beginning:

I am building a new PC with the following:

Asus P5B motherboard
Intel (775) Pentium 4 3.4 GHz processor
512MB DDR2 RAM
600W EZCool power supply

(The rest is irrelevant because I can't get it to POST so far!)

The system will boot fine as it is (without anything added other than the above) - just gives a beep error about no graphics card. (P5B doesn't have an onboard one).

When I put in a PCI-E graphics card the CPU fan and Graphics Card fans spin for about a second then the PC switches off.

I have taken the motherboard out of the case (to check for shorts), reset the CMOS and STILL the problem persists.

Does anyone have any ideas? I don't want to have to buy a new CPU unless I know for certain it is that (I have spent a fortune on this already!!)

the graphics card involved is an EN7600GS top silent which doesnt have anextra power supply to the card (which is what i thought might have been the issue)

suggestions welcomed

 

[Lax]

Could be a problem with the Gfx card/slot. If he has an extra PCIe card to throw it in and see if it will boot. If it boots with the PCIe card then it's a card problem. If it still won't boot with another PCIe card in there it's most likely a slot problem.

 

[Dngrsone]

What are the current capacities on that PSU? Believe it or not, a 600W PSU can still be underpowered if it isn't providing enough current on the +5v or +12v rails.

There may also be a short between the motherboard and chassis causing problems-- the physical presence of the graphics card my be flexing the motherboard just enough to close the short.

 

[Lax]

What are the current capacities on that PSU? Believe it or not, a 600W PSU can still be underpowered if it isn't providing enough current on the +5v or +12v rails.

There may also be a short between the motherboard and chassis causing problems-- the physical presence of the graphics card my be flexing the motherboard just enough to close the short.

Indeed those are all good points, I hadn't even thought about them when I was putting up my suggestions.

Definately take into account all that said above (sans the +5, I'd be more worried about the +12).