asus mother board power up problems

hi all. im trying to power up an asus mother board, i have used 4 diffrent power supplys. i know the cpu is getting hot but i cannot get any on screen display, the mother board has a 5 switch ece switch. and im bigining to think this maybe the route to solving or partly solving my problems......... i have never had this type of problem befor. and i have sucsessfully built a numerious amount of pcs. but this one has tobe the daddy of all brain emerages. please is there anyone with the free time to help me bring this thing to life.