A power supply went out on my computer, I put another power supply in and now it will not do anything. The light on my board is on but nothing happens when I press the power button on the computer. When I plug the power supply into the board and nothing else, the power supply, cpu fan and the sounds associated with booting up respond when I press the power button. but when I connect the power connectors to the drives I get nothing. I put a powersupply that I had used the night before, and now it is doing the same.

Windows XP Professional Service Pack
1.10 gigahertz AMD Athlon XP - processor
ASUSTeK A7V8X - motherboard
NVIDIA GeForce4 MX 420 - Display adapter
1 GB memory
antec 350W - power supply