HereLink Air Unit telemetry port not working

HereLink
1

Hello,
We have an Air Unit with a telemetry port that suddenly stopped working.
No connection to vehicle possible.
Pairing and video works though.
Eric at CubePilot forwarded me to this forum.

Any help appreciated.

2

First thing I would do if it was working and nothing has changed on the FC side check the cable with a Multimeter or if you have a compatible one try another.

Second make sure you turn off Location on the Herelink ground station as there is a known bug that affects telem.

What FC are you using and can you confirm the settings

3

Cables good, Location off.
PixHawk Cube black with latest ArduCopter 3.6.11
Multiple boards tested.
Another Air Unit works fine.
Hardware problem?

4

Have you tried to reload firmware into the air unit?

5

Yes already tried unfortunately.