If it's rebooting every few minutes it's because it lacks enough memory cope with the size of an EPG due to the many new channels that gave been aired since it was designed. Go to your IceTV Guide Settings and disable all the SD channels that are duplicated in HD, as I think your Toppy can handle MPEG4, if I'm wrong do it the other way and disable HD channels. That would be ABC, SBS, SBS Vicelabd, 7, 9 and 10.