Bought a PSU to replace a dead unit, replacement turned out to be DoA. I have 3 sets of components available for testing and confirmed it dead on all 3. I confirmed all 3 sets working with another supply. It also failed a pin test. The issue? RMA refused due to no fault found. "Used the PSU to power Test Bench 11 using an Nvidia GTX770. Powers up fine, ran Heaven benchmark for a few mins with no issues. NFF" I have since reconfirmed all 3 sets as working due to the notification. Could I get an explanation? If no RMA is being issued I would like to pursue a refund and purchase elsewhere.