When I plug in the power cord, the psu starts making a high pitch sound. This isn't the first time it happened, before.. If I waited a while the sound would stop and I was able to turn it on. But now it won't turn on at all. I know that all the cables are in the right place, this issue just started a couple weeks ago. I've tried resetting the cmos but to no avail. Also I'm aware that the psu was garbage from the start, it was this 480 watt logisys psu that came with the chassis. However when the power cord is plugged in, the green led light on the mobo turns on. I'm not sure if using this bad psu has damaged any other part of my pc or not, so I don't know if I'll be fine buying a new psu or not. Lastly, this pc is only almost 2 years old. I'm not sure what to do at this point.