I built a new HTPC today with the help of some friends and we were having a problem with the graphics card that I was using (a ATI Sapphire 6570) in that we couldn't get a signal on the TV even though everything else was working fine. In the meantime, I picked up a new graphics card and VGA cable just in case I needed to use it on the graphics card instead of the HDMI cable when installing Windows 8. When I got back home, I switched off the computer (I'd let it on for a while for testing purposes) and pulled out the power cord before taking out the graphics card to see if I could get a signal from the onboard graphics. Now this is where I have a problem, I heard a tiny crackle when plugging in the power cord even after the power was switched off and after that, the PSU wouldn't work after switching it on. I've tried a spare cable as well and it doesn't work with that either, and to make matters worse, with the PSU that's not working (the XFX Pro 650W XXX), it's not available in the shops and there's only one online supplier in the whole of the UK! Can anybody tell me why this happened and what I can do biefore I look at RMAing it. Also in the meantime, can anybody recommend me a 650W PSU that's modular and reasonably quiet and is available to buy offline and that I can use as a spare?