Hey guys, I had a PC I built and the power supply was super noisy, but otherwise everything worked fine. I got a new PSU today, and hooked everything up, but now pressing the power button does nothing. The motherboard speaker doesn't make any noise at all. However, there's an LED on the motherboard which turns on/off when I hit the on/off switch on the power supply, so I know there's power coming in.
I'm a bit confused as I've never had this issue before. The power supply could be broken, but then why would that LED react when I hit the on/off switch?
Make sure that you connected everything correctly and you did not bump something else loose in the process, if you find nothing wrong swap back the old PSU and see if it works. If it works then you got a bad unit!