Z68A-GD65 G3 Reboot Loop

Question

I'm putting together a new build and I've run into a reboot loop.  When I attempt to start it up, it runs for about 5 seconds, then turns off.  This goes on in an endless loop.  It never gets to POST.  The 6 LEDs light up and the BIOS ones don't (so this appear normal).  I have never gotten a successful bootup.
My setup:
Motherboard: Z68A-GD65 G3
CPU: Intel Core i5, i5-2500K
Memory: Kingston HyperX (4x4GB DDR3 - 1600 CL9 240)
Power Supply: OCZ ZX Series 850W
CPU Cooling: Xigmatek Gaia SD1283
I am not listing anything else, because I am not getting far enough for it to matter.
I am running with only the above pieces connected to rule out all but the essentials.
I've inspected the CPU and slot.  Both appear fine.
I've cleared the CMOS using the button on the I/O panel and removing the battery.
I've subbed out the Power Supply.
Only the 8 pin CPU and 24 pin motherboard connections are made.
I've tried various things with the RAM.  All 4, just 2, and just 1 (in the DIMM1 slot).  Most testing was done with just 1.  I have tried all 4 in the DIMM1 slot.
I've removed it from the case and booted it up in the cardboard box (nonconducting) it came in, to rule out a short.
I've inspected the motherboard carefully, no obvious issues.
I've checked that the CPU cooler is making good contact with the CPU.
I've verified that the OC button is not active, although I've tried that too.
I've read through the forums, but have not been able to find a solution that works.
Please help.  Thanks.

Answer 1

I had this very same problem with a Biostar T-POWER I55 2 years ago, to cut a story short the retailer and the distributor who handled Biostar RMA's rejected the RMA.
I spoke to Trading Standards/Consumer Direct as I read in the Sales Act that in the first 6 months of a purchase if the damage cannot be proven to be done by the end user then a warranty claim still exists.
Finally after stating this & quoting the Trading Standards Reference number to the retailer, I got a call from them saying they would offer a refurbished motherboard worth £113, my original motherboard cost £138 so I refused this & asked if they would agree if I could purchase a brand new alternative for (£75ish) around 50% of its purchase value to which after another day they rang back & agreed.
You are not the first and won't be the last this has happend too, One manufacturer will cover for warranty in these circumstances because I asked them.
I suppose you could get a 2 year warranty via Amazon, small expense for peace of mind which covers you for Accidental damage as well as mechanical failure, quite good if the  motherboard pins snap off the motherboard.
Click >> SquareTrade 2-Year Warranty Plus Accident Protection (£150-175 Items) £29.99
The above only complys to people in the UK, other countrys have different sales of goods act laws.