My PSU is a CoolerMaster GX750W, it's only 1 1/2 years old. When I first bought it made this sometimes soft sometimes loud electrical buzzing sound, It was definitely coming from the PSU. Now my PSU is dead, tried to turn my com back on but no response. Have you guys experienced this situation before? And if so, was your mobo,cpu,gpu etc fried or was it okay?