...did you remember the spacers between case/motherboard?
. lol otherwise you're dealing with dead board/processor, which will lead to a long sucky process of RMA's. try sticking the processor back in the emachines thing and see what happens. if the emachine boots up normally, you're in need of a new board, and if the emachine doesnt boot, you fried your processor AND you're board. oh, one more thing...any beep codes when you try to turn on the Asus thing?