Does anyone know any more information on the "whining" noise I'm talking about? It concerns me because if that is a signal that the machine is going to fail soon, i don't really want to put anything of value into it. Like I said, it only occurs when the machine is either off (or in sleep mode) and it's plugged in. When you press the power button, the noise instantly goes away. Most of the time it only lasts 10 seconds after being plugged in (or turned off) however if it's been used for a while it will last longer.

I might be able to get a video of it if needed.