changing a power button

i had this problem for a long time...the problem is that when i press the power button sometimes it does not work at the first try or. Multiple tries and i even tried to use the reset button but still sometimes this problem happens..i recently changed my motherboard CPU and ram for upgrade also...

Hello, This is my first post and I am just trying to figure out if there is a way to change a power button out and a usb hub out on my Alienware desktop tower? My goal is to hide the tower away in a computer desk but still have the usb ports and power buttons available to use just mounted...