ok thats a good sign then,but it is starting to sound like a dead board.as far as a good power supply look at the stickies here.that place is the power supply guru.he has stickies for best power supplies period,and best under 150$
PC Power Supply Discussion - jonnyGURU.com Forums
edit: also have you double checked all your connections inside your computer if you have knocked something loose it may be causeing the issue.