GPS only works when connected with usb and 3DR

My GPS only works when connected with USB cable to PC or when using 3DR wireless telemtry. If I dont use these 2 methods the blue connect led blinks for ever. When connected with USB I get 5 GPS satellites indicated in mission planner with in a few seconds.  Any ideas ? I have had this problem since day one.

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  • We need a bit more information:

    • APM version?
    • Which GPS are you using?
    • How is the system/APM powered?

    On the surface it sounds like a Vcc power supply issue but...

    -=Doug

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