I have just finished building a computer and I am having the following problem. Computer will not restart after I turn it off with windows. I was having intermitent problems of it restarting itself but that problem seems to of gone away. I checked to make sure all cables and everything is in tight and not loose. Before I go ahead and replace the power supply I wanted to have some feedback from more experienced builders than myself. I have to manually turn off the switch in the back of the computer and then the computer restarts, if I don't do this it will not restart. I go into start and turn off computer, but when I try to restart power comes on but it doesn't post just the fan spins and I get no picture. If I turn off switch on back of computer then on, then computer restarts when I press the on button. Is this a power supply issue, mother board, video card. I am at a loss any info is appreciated!!