After setting up my DJI Ronin-S for the first time, I discovered that the record button didn’t work with my camera. I triple-checked and confirmed that my Sony a7iii camera was listed as “compatible” with DJI Ronin-S. My Sony alpha camera has both USB-C and mini-USB ports. I tried both types of cables but they failed to communicate with the DJI Ronin-S. I confirmed USB settings within the camera and it appeared to be correct. My fix for the DJI Ronin-S record button not working was to use the third cable that came with the DJI Ronin-S. The third cable looks like it has a little light on it. It’s the IR cable for the DJI Ronin-S and essentially functions the same as most any Sony alpha IR remote. I discovered this solution after several hours of troubleshooting and felt obligated to share the fix with everyone. I hope that this solution fixes your DJI Ronin-S’ record button too!