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Can't boot up / no screen messages or beeps

Last response: in Systems
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January 8, 2013 7:49:53 AM

Hello, got this setup:

CORSAIR FULL TWR OBSIDIAN SERIES 800D PC CASE (CC800DW)
CORSAIR Fan, AF120, high flow 120 x 25, 3 pin, Single pack (CO-9050003-WW)
ASUS RAMPAGE IV EXTREME Intel X79, Socket 2011, ATX (RAMPAGEIVEXTREME)
Sapphire Radeon HD 7970 3GB GDDR5 PCI-Express
Sapphire Radeon HD 7970 3GB GDDR5 PCI-Express
CORSAIR Netzteil 1200W Corsair AX1200i (CP-9020008-EU)
CORSAIR Vengeance DDR3 1866MHz 32GB CL10 Kit w/4x 8B, CL10-1110-30, 1.5V, Vengeance Heatspreader, Intel P67, Z68 and X79
INTEL Core i7-3930K/ 3.20GHz 12MB 64Bit SR0H


and when all is connected it looks like its booting up, but I get no beeps saying error codes or anything and the monitors connected goes to powersaving....

what can I have done wrong? The motherboard lights up, the fans are running and the gfx-cards lights up and their fans are running to...
January 8, 2013 7:55:58 AM

try

clearing the cmos
removing the video cards and running on onboard video then one card at a time
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February 12, 2013 7:35:54 PM

ok, because of different things I've had no time to try sussing this before now, but I'm trying to get my head around things.... So here is the deal. Everything lights up and looks ok except, there is nothing on my monitor (which works on a different computer), the only error code I can see is the one on the main-board which says 0C.

So fresh build, using one gfx card and one ram to try to at least get anything on my monitor, but nothing... I need some more help and advice. I've tried disconnecting as much as possible to try iron out what can be wrong.
February 21, 2013 8:57:11 AM

I sussed it myself, had to unplug everything and then add just power and main board first, then add gfx, then I got bios up on screen, then add memory, harddrives and rest... Ended up with having everything back to where they was when it did not work so really wierd, but at least it now works :) 
!