Another problem after RMA. Asus A7n8x

Yes, i sended my a7n8x to rma a couple of week ago because it wouldnt let me install or reinstall windows. It stays in the "windows is now beginning to install" or in the existing windows in the MUP.SYS driver. Yesterday i got it back, but it dosent boot, it turns on but no video is given neither the beep from memory check. Every part its ok since iv'e been using them in another board. I thought that it was the mod i did to the amd socket for the voltage but i took them away and nothing.

I changed video card, memory, disconected all IDE anmd Floppy, and nothing.

Does anyone know what else should i check for?

Thanks

Well so you all know i called the tech support, and gues what?
I HAVE TO SEND IT AGAIN!!!!

This sucks. They said that i have a new one now!!

I'm going to ask them to send me a deluxe version this time for all the trouble im having!!

What do you think?