Rasmus Goese said:
First, that standby light on the MOBO isn't much of an indicator of anything. It doesn't take much for that to be lit and doesn't rule out the PSU. Having said that, the Corsair CX series is not one of their best efforts and are subject to fail. The first thing to do is to try another PSU.
I'll try that, might take a few days before I get a new one though. Unless I can find an old one in the office. I will return to clarify if it worked or not.
Okay. I am not someone who swaps out stuff til they find something that fixes it. That not only is time consuming, but can be expensive. In this case. from your description, the place to start is the PSU. As for Corsair, the GS, TX, HX, & AX are all good.