Bear with me since I am typing on a crappy Mac keyboard.
One of my clients recently described to me that her socket 939 Asus A8AE-LE froze while she was using the internet and never booted again.  
 
I dissasembled the motherboard and switched the ram (Hynyx), the processor (3800+), and the PSU (24 pin) to my socket 939. They all worked like a charm on my Foxxconn.  
However, when placing my components (Hynyx memory (same type as her's) , 3500+, and psu (20 pin) back into the Asus, nothing worked.  
I took apart the motherboard from her case and tinkered at everything I could think of, even the jumpers but nothing would turn on. The only things that would turn on were components connected directly to the PSU. The fans connected to the motherboard dont even turn on.  
 
I then thought the motherboard was to blame but getting a new one was hard becase it was no longer being manufactured.  
 
So I ask my client if she would like to keep her windows partition and order the same motherboard or reformat but upgrade to an AM2. She told me that she would rather me get the same motherboard as the one before.  
I got the same model number off ebay (working, tested) shipped to me and I stumbled upon the same issue. The new motherboard would not boot and shows the same issues as the other motherboard. Can anyone help?  
 
I have tried 5 different power supplies, but I haven't tried different ram since my type is the same as her's. Any suggetions or does Asus make a crappy board?

What happens if you try to boot with no RAM at all? Any beeps?

I always like asking this question... you wont hear any beeps if you dont have a speaker onboard, or connected

No beeps when attempting to boot without ram. I even switched ram (non Hynix,  but non branded), there is no LED  

So, her RAM, PSU, and CPU - all of which were working on an ASUS A8AE-LE - have all tested good on your MOBO? And yet another MOBO identical to hers will not boot same components?
 
Unless there is something you are missing about how to start up this particular board it looks like you got a bad one, again. That's not very likely, but not impossible. Yet, it's off EBAY. Hmmm
 
I trust you have tried to start it up in a barebones setup outside the case?
 
4 pin CPU aux plugged in?
 
You say the board was working/tested? Can you ask the seller what he tested it with?

The RAM, CPU, and PSU from her original fried board were all working when i transplanted them to my board. I transplanted my components and they did not work on her original board.  
Upon getting the board from ebay, the same thing happened. But I really dont want to believe this is a faulty board.  
 
I just asked the seller but I am awaiting a response.  
 
Yes, I did try the Aux 4 pin.