A little bit of stupid can go a long ways. I was sure I had a problem with either my Skyview or the SL30 Nav/com, or both. Turns out I was just not smart enough to know how it was supposed to work! Of course I got smart AFTER I had torn the connection cable all apart and checked each wire for continuity etc. I would touch a frequency and keep pounding on it, watching the radio change channels, but it would not. After all this is a Skyview TOUCH, so touching it should do something. Turns out it is not supposed to change that way, you get a frequency highlighted and then touch the "Tune Com" part of the screen, and it jumps right in there. That is powerful stuff, I got to sit in there and play with that a bit more.