If you have a Z15-GH3 and updated on the DJI website you should have notice that they removed the GH3 and replaced it with GH4. The problem is this. There are 2 different updates for the IMU. One is from April and one is from July (July on the GH4 site). Both IMU updates seem to be ok but if you updated the GCU to anything over V1.4 you will lose video. I have been able to reflash back down to V1.4 and now have video. Go here: http://www.dji.com/product/zenmuse-z15-gh3/download but beware the GCU still wants to go to V1.8 or 2.0 even though the website only lists 1.4. As far as DJI is concerned, I have sent 3 different support tickets reporting in detail about this issue. I keep getting the same response back to send my unit in for repair even though if you downgrade the unit (which ever unit they are talking about) works by downgrading|
Thank you for contacting DJI.
The issues that you're describing require for you to send inyour unit for repair.
In order to be issued an RMA (Return Merchandise Authorization)number, we encourage you to call our support staff via phone to discuss youroptions.