Hello. I have a problem, and it's kind of serious...I have a computer (System #2 in my profile) with a Antec 500W power supply...Today, I tried to turn the computer on, and it wouldn't boot, and there was this strange high pitched noise coming from the computer. Tried a couple more times, still wouldn't work. So, I disconnected all of the power cables to all of the devices in the computer and checked the PSU, and lo-and-behold, a high-pitched whine comes from the PSU whenever it's plugged in to current and switched on, even when no devices are hooked up to the PSU. Does this sound like I need a replacement?