I have an SLI-DR, and I'm having problems booting.
I turn on the pc and the 4 Red LEDs flash for some secs, then they hold, then they flash again and hold again... and so on.... they stay like that for some mins, then it starts the boot. And it holds the last LED and gives a 3-4sec bip.
I believe that 4 red leds means that you chipset is screwy, but I am not certain, I too own a SLI-DR Expert, had that exact problem but retuned the mobo and got me a new 1
I do recall the manual explaining the led codes.