My power button has stopped working. Regularly, I press it lightly and it would start my computer up no problems. Now, it...

I am having a similar issue...my power button seems to be stuck. It won't click. It's not crooked. I've replaced the power supply. That didn't help. Can you please suggest something I can try to fix this? I bought a new button, should I go ahead and replace it? Or is it something simpler maybe? Thanks in anticipation of your answer. Kirstie :)