My brand new (replacement) iMac is plugged in but not set up yet, i.e. it hasn't been turned on yet. A soft green glow is coming out of the right side speaker grille - from under the housing. The glow reflects off the table surface and/or the keyboard's number pad when the KB is stowed under the screen. When I look through the speaker grill into the iMac's innards, I can see a green LED (?). Does this sound normal? I don't remember seeing this on the first unit, although I wasn't specifically looking for it at the time. Thanks.