Has anybody come across following problem?I am using D2H for last 1.5 months. It was working perfect. But since few days I found one problem. After some time, STB refuses to allow to change channels. Both remote and STB buttons don't work. Seems like STB has hanged. If I switch off and restart the STB, then all works fine again. I have faced this problem intermittently. What can be the problem? Any clue?