I have pursached a new Asrock Z68 Extreme4 motherboard with an i7 2600K and 2x4GB ADATA DDR3. My problem is that it doesn't boot or beep, and the onboard drdebug led constantly displays "00" - which is according to the board's manual, "not used". The power cables are probably conntecting, because if I disconnect the 4+4 or 20+4 cable, nothing is displayed on the leds. Has anybody seen this error? What are the possible causes?