I have recently built a new gaming pc. It worked fine for the first few months, the for a few weeks it wouldn't power on unless I shock it slightly. I took it apart again and everything is in nice and tight, but the 24 pin connector will only power the pc if I wiggle it slightly. Not it won't turn on at all, it shows signs of life if I pull out the connector and push it slowly in, but as soon as I push it the rest of the way in it cuts off the power. Please help.