I just got my 2nd iPronto (I had to exchange the first one because it would not boot up) and it locks up when I hit the Master on/ off buttons about 1/3 of the time. The buttons turn on/off 3 devices (TV, Reciever and Sat. with learned IR codes) and for some reason the whole unit locks up and I have to hit the reset button. Anyone else have a similar problem or do I need to get a 2nd exchange?