[Yokohama]

Unlike my old G5 iMac, there is no LED light on my new aluminium iMac to show it is asleep. Is there a way for the new Mac to indicate it is in sleep mode? Apple support was no help. One guy said there should be a "light on the right hand side." I presume he meant on the actual display. The second techie said she didn't think so. No one got back to me with a definitive answer.

[Simon]

The aluminum iMacs (Mid 2007 and newer) have no sleep light.

http://support.apple.com/kb/HT3016?viewlocale=en_US

[mduell]

It's there, you just can't see it shine through the aluminum.

[Simon]

Actually you can see something through the aluminum. If you darken the room and hold a bright surface (like a piece of paper) below the speaker grills you should be able to see the PS LED.

But there is no sleep light.