my friend just bought a new motherboard, he hooked it up, but it didnt work, so he brought it over to my house so i could help him hook it up. but i couldnt do it either, so i took apart my computer and took my motherboard out and puted his into mine and set it up, and it also didnt work. I then puted my motherboard back into my case, hooked up everything, turned on my computer, every fan turns on, and the red light in the front turns on. but i couldnt see anything on the screen, and i dont hear any of my harddrives go. i disconnected everything inside and reconnected to make sure that they are all secure. and the same thing happens. any help?