I've had a HDS10 Gen 2 w/SS for a few years now and I still get "NO SOURCE" on the structure scan. Sometimes it's worse than others. Sometimes after powering it down it won't happen again for the rest of the day and sometimes nothing helps. I've seen the posts about changing out the cable and have done that twice but it doesn't help. It has done it on and off ever since I bought it. Can it be a software problem? Does anyone have any ideas?