Re: No Video Signal
It could be that your mother board is grounded. ie. something metal is touching the board and therefore stopping the flow of electricity. This happened to me recently. Try starting the computer with the mother board out of the case.
Or, it could be your ram. If you have more than one stick try takeing them out and starting up with only 1 in at a time.
Or, it could be that when your powersupply went bad you ruined the mother board.
There are a miriad of other possibilities but those are a few that I've experienced lately when it comes to your problem.