My semi-new Power Mac G5 (Early 2005) 2Ghz machine is emitting a low range electronic beep/chip every second or so. Is this normal? Lately, it's gotten worseto the point where it's become really annoying. Also, it sounds like one of my fans is off-balance and it's emitting a flapping noise. I wouldn't normally care, but the sound is noticeable when using the line-in port on the back and when using video conferencing like iChat. I have AppleCare, so I'm assuming Apple will send someone out to my house to replace the power supply and fan? Anyone else with this issue?