[CUBE] Periodically, I get a Disk with a Flashing Question Mark

[Todd Masco]

> I recently acquired an Apple Cube from Overstock.com.  Recently, when I
> or my son turn it on, we hear a loud noise and we get a screen that
> contains a flashing folder/disk with a question mark.

You don't describe the noise (is it a single noise, more an ongoing 
rattle, or...?_, but from the sound of it your hard drive is either 
failing or fully toast.