12-12-2011 09:59 AM
Below is the link to the notebook tour guide for your model.
Please see Chapter 2, page 4, for the location of the wireless button (labeled as # 3 in the illustration.
02-17-2012 05:34 AM
Below is the link to the G72 notebook service manual.
Please see page 2-4 for the illustration of where the wireless key is. It looks to be the furthest most right function key which shows the radio beacon icon in the illustration.