My GPS is working fine with my APM2.5 board connected via USB.
But with power from my 2s7,4 lipo the blue led on GPS antenna board is absent and no GPS counts.
If I start with USB connection, then connect my battery and then remove the USB cable the blue led is flashing and GPS works for about one minute.
Cant be an issue with my receiver (Futaba) or Telemetry transmitter (3DR Radio for telemetry Air Module 915Mhz) because they are connected and powered when using USB connection/power.
Somebody have an answer to this?