well me and a friend have got an ortovox d3, both wouldn't be a year old, recently they have just cut out, they wont pick up the collars they turn on but when u swicth it over to find the channel it goes blank and the green light at the bottom flashes. i know there is a five year guarentee with them but was wondering has anyone else experienced this problem? before i get in contact with bryan incase it can be avoided. thanks