Problem with a new spektrum system

[Nick K]

Just treated myself to a spektrum dx3 system but i seem to have a problem with it
When i switch it on all seems ok for about 30 seconds then the light goes of on the reciver. If i turn thr tranny off and on it works again then stops.
I have tried reseting it again and again .
Anyone had this problem ? feel like sending it back and sticking with ko 40mhz.