|It's unlikely the switch is bad. A computer power button is a momentary switch, similar to a doorbell button - press & release. The contacts are NOT supposed to be bridged. However, if you unplug the switch from the board, you should be able to power up the system by momentarily shorting the 2 pins with a screwdriver blade. Or if your case has a reset button, unplug the power switch cable & plug the reset button cable in it's place, then use the reset button to power up the system.|
What makes you think the switch is your problem?