My connections are

bmpcc----->zenmuse GCU----->Lighgbridge(Air)...........................Lightbridge(Ground)----USB---->iPhone 6 pluss running lightbridge app

Flight controller is a wkm

All latest firmware on camera, zenmuse, wkm, lightbridge air & ground
Symptoms:
   Zenmuse gimbal LED indications (SWITCH IN HD POSITION)
   --- Camera off (Solid Green), Camera on (Solid green and solid Red)
   --- Lightbridge Air---Link (Green), Video (Red)
   --- Lightbridge Ground ---- Link(Green)
   --- iPhone app NO TELEMETRY(I think due to no video) NO VIDEO

Checks made:
---Camera hdmi out works when directly wired to hdmi device (TV)
---Zenmuse sends AV just fine when routed via iOSDii and a transmitter, with switch in AV position on gimbal
---Swaped the zenmuse hdmi->gcu cable, same result.

Guys did I miss something I am pulling my hair out over this, please can you help. I buy DJI kit because it just works, thats why we pay a premium :-(

Gus

No one contribute yet?

Your method seems very logical, is the issue still there?

Yes it is

I just want to fly

Imho, sounds like a bad cable or hd/av board.

I am of the same opinion I really just want to ask the right question before returning it. I took it back to the supplier yesterday to get a replacement gimbal. I will report back. I did test the lightbridge with a direct hdmi feed from a gopro all goof there. Then fed my camera direct into lightbridge again all good so it sounds pretty certain to me.