Has anyone had problems and experience fault finding a BR24 radar unit??

Mine stopped working, checked the cables and it started up again. 

I installed a point 1 gps then it stopped again, now after reset it will find the radar so the ' No radar " message now changes to "no Scanner" 

Web search suggests to check power as they are tempramental if there is a sketchy join or point, had a quick look but didn't spot anything.

Final option would be look at a new 3g or 4g unit anyone gone through that line and recommendations and or why?