I am still a bit of a newbie, so I apologize if this question appears stupid. I would like to put my TF101 into apx mode. Everything I have read suggests the way to do this is with the device off, hold down the volume up key and the power button at the same time. When I do this nothing happens. I do not think this is a hardware problem. The volume up key works fine when the device is on. In addition I can boot into recovery mode by holding the volume down and power key the same time. Any advice? Thanks.