Cheers, time to throw up a help flare though!
So I need some help lads - the ignorant part is starting to show.
I decided to pop the stock cables back in while I wait for my PSU tester so that I could get it all up and running.
First things first, when I turn on the plug the standby power light that Asus says should be green appears to be amber. Hmm...
So, push the power button and it all kicks into life - the pump starts up, the fans (powered through the mobo) turn on and the graphics cards light up but I got no video and no beeps, nada. If I leave it running then I get all the POST error leds lit up in amber.
Oh, also perhaps someone can tell me if this is normal - both GFX cards light up initially, but the SLI bridge LED is off. Then after a few seconds the first GFX card goes dark but the bridge turns on. Then the GFX card comes back on again.
Anyway, after a bit of fiddling around I have very carefully just bumped the GFX cards out of their slots and disconnected them, running the hdmi into the onboard connector. After doing that, the thing posts and I managed to install windows. The funny thing is the power led is still amber and every single POST led is still showing amber, but the computer appears to work absolutely fine without the GFX cards installed - I am infact writing this very post from the new computer.
Asus says this about the POST leds:
The POST State LEDs provide the status of these key components duringPOST (Power-on-self test): CPU, memory modules, VGA card, and hard disk drives. If an error is found, the critical component's LED stays lit up until the problem is solved
Now call me dim, but how am I managing to write this post from a seemingly fully functional (albeit with my GFX cards currently disconnected) computer with CPU, Boot device, Ram and VGA all showing errors on those LEDs?
Any ideas as to what the badger's beard is going on here would be much appreciated.