Quote Originally Posted by psumann
It sounds like one of the connectors is shorting out and the short circuit protection kicks in. You can try all the connectors one at a time and see which one is bad. I'd suggest you to contact Enermax and get it replaced.
Yeah thats the conclusion I came to in the end. Still waiting for a reply from Scan, even after a forum thread and an online query, no reponse.

does the same on all connectors which makes me think it's a bit more terminal.