Hello! I've recently built a new PC for my dad which includes a Gigabyte MA77OT-UD3P, an Amd x2 550, 4gb crucial ballistix Ram and a coolermaster switching power 460W PSU. The problem is that whenever I shut down the machine, I cannot turn it on again without first removing the power cable, then reinserting it and then pressing 'on'. Any ideas, it's pretty annoying to have a problem like this on a new build and want to get it sorted. If you need any more system specs just holler. Cheers.