it's just staying green (standby) (this TV never had a red light)
It goes a fainter green when its turned on.
So it's hrd to say if it's in stndby or 'on' mode I'm afraid, but when I power it up again and hit the power on button it goes to a green colour and stays that way no matter what
I've hooked it up to a PS3 and the same happens. I guess it's a new set for me then :D