Item Tested, No Fault Found? But I fully tested everything and am sure it is faulty

[Golden Dragoon]

I RMA'ed an asus P5KPL motherboard, and have just discovered scans reply in my junk folder (I really aught to check this more often)
Now the computer this was in simply stopped booting one day after about 11 months of faultless performance, and my first thoughts were that it was the power supply, but testing it with 2 other known working psu's resulted in the same symptoms (I reset the bios etc...)
so I swapped out the memory and graphics card with my own ones, still no boot, so then I tried using my q6600 in place of the e4400, and tested the C2D in my machine, it worked on my computer, but the asus+q6600 still wouldn't boot, and that is with every component replaced with known working ones, and all components that were previously installed on it confirmed as working on my motherboard.
So I am extremely puzzled as to how the motherboard testing has come back with no fault found.

One odd thing is that the email saying that that the rma had been received came less than an hour before the one saying no fault found, is that normal? I spend several hour checking, and rechecking the motherboard, and as everything else worked perfectly and my known working components wouldn't work, I deduced it must be the motherboard.

[Golden Dragoon]

I would have appreciated a reply, would it be possible to know what components were used in the testing of this motherboard?
I have retested the components from it yesterday and they are all working and the entire system was working before the no boot issue, so there were no incompatibility's and the power supply, which is what I thought might have been the issue, powers my watercooled (pump powered from psu) q6600@3.6ghz, 6gb of ram, abit ip35, radeon 4850, and 3 hdd's + 5 fans perfectly from boot to a full 24hr stress test at full load, as I thought that it could have been an issue if it allowed my system to boot but was unstable but knowing it powers my rig it should deal with the much lower powered one in it's stride.

[Mark@SCAN]

Please PM me your invoice/RMA details and I will have a look into this for you.

Regards

[Golden Dragoon]

Thank you for looking into it for me, am sending the details now.

[Golden Dragoon]

Any follow up on this?