APM 2.6 GPS doesn't connect

I’m knew because of buying my first APM2.6 for my T-Rex 700.
The problem is, that everything works except the GPS ( separate Ublox).
The compass on this seems to work, but in mp ‘no GPS’ is shown.

any ideas?

kind regards,

This sounds like a hardware/electrical problem. Probably not specific to TradHeli, you might have more luck posting in the hardware section.

If you post some detailed pictures of the setup, maybe I can see something. But it might just be that your hardware is defective.