No beep or display at boot

[NewGuy2]

Intel Core 2 Duo E8400 Wolfdale 3.0GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor - Retail
Asus P5N32-E SLI PLUS LGA775
Gigabyte 512MB 8800GT PCIe
OCZ StealthXStream 600 Watt Gamers Power Supply Unit - OCZ600SXS-UK
CT2KIT25664AA667 4GB kit (2GBx2), 240-pin DIMM (this is the correct memory module i used crucials tool to get it)

I havent even bothered trying to connect anything else to this until i resolve the current problem. I have tried everything, replaced the motherboard tried one memory stick at a time and still nothing. I turn the system on and the fans work everything lights up but my flat screen just goes back into sleep mode and no beeps at all.

(when i had the harddrive fitted it had a red light next to the power button on the case)

I know if there isnt any beeps its failed its "post" and what i got from other forums is it maybe the bios needs upgrading but the asus website is down and how would i update the bios if the screen isnt working!?!?

I have to use the graphics card to put the vga socket in as there isnt a vga slot fitted on the motherboard, i have checked and triple checked the connections everythings fitted fine.

So far i think i can narrow it down to either the cpu the bios or the graphics card but id really could do with some advice.

[Sylvander]

1. Strip back the hardware to the absolute minimum, which is...
PSU, mobo, CPU+heatsink+fan, internal speaker, keyboard

2. Remove the [possibly faulty?] CMOS battery.
That will make the BIOS use its default configuration settings.
You can fit a new/good battery [to be able to deviate from the BIOS's default configurations] once the POST is seen to be functioning normally by the fact it completes.

3. connect the on-switch and use it if it seems OK, otherwise short the pins on the mobo [using a screwdriver or whatever].

4. Ideally the mobo would be out of the case on a non-conducting surface [to eliminate possible shorts from the mobo to the case].

5. With no RAM or video connected...
Provided the few remaining connected hardware items cause no problems...
The BIOS's POST should START, CONTINUE RUNNING, and TESTING...
The 1st RAM test should fail, and the POST should generate beeps to warn of that failure, and if the speaker is functional you should hear those warning beeps.
That will tell you the POST is functioning normally and reaching that test.

6. Now fit a graphics card that matches the type required by the default BIOS config settings [which is this?], and at Startup you should still hear the RAM test failure beeps.
I'm confused here. [I'm no expert on hardware]
You say their isn't a VGA socket.
Does the board and the default settings require a PCIe video card?
And is that what you fitted?

7. Now fit 1 stick of RAM in the 1st slot and Startup.
There should now be NO RAM TEST FAILURE BEEPS.

Lets see if you get that far.