Thanks for getting back with me. First I want to clarify that I'm trying to get 2 separate Dells to work. One is mine. One is for my friend. Now the one I changed the motherboard in is mine and yes I plugged everything back in. I had the manual plus I took pictures of it before I tore it a part. I went to Frys Electronis last night and got some of that heat sink stuff to put on the cpu. I haven't tried it yet. When I press the power button I get nothing. No lights, no fan. Only the inside green light come on.