It might not be a CMOS error your getting it might be a camera firmware error. Both errors will flash red on the camera, one faster than the other.
What i would do again is a clean install of the FC200 firmware. Format the SD card so it's clean then download & unzip the file, place it in the root directory on the SD card. Also do me a favour make sure the camera cable is pushed as far as it will go into the back of the camera, sometimes they are not fitted correctly.
The below is the latest firmware version spec for our camera.
DJI FC200 Camera V1.1.9 2014-01-20
Also check the below release notes from DJI before installing the firmware again.
Major New Features:
Thank you for your patience !
The latest camera firmware v1.1.9 now supports Adobe DNG RAW format capturing. It also records the GPS location and relative attitude in the metadata of the Adobe DNG RAW file. DJI will keep working hard on improving the quality of the RAW file and providing the best aerial photography solution to our customers. Thank you for your constant support !
Update Procedures:
Follow the below instructions to update your firmware.
a) Download the latest camera firmware and unzip it.
b) Get a clean Micro-SD card (less than or equals to 32GB), and copy the °∞firmware.bin°± file to the root folder of the Micro-SD card.
c) Make sure the camera is turned off, and insert the Micro-SD card into the camera before turning it on.
d) Turn on the camera.
e) The firmware update will begin automatically. A yellow flashing LED on the camera indicates that the camera is updating.
f) When the yellow flashing disappears, the firmware has been updated. After a successful update, the °∞firmware.bin°± file°Øs name will change to °∞firmware.bin.bak00°±. This file on the card can now be deleted.
Special Notes:
a) During the update, do not turn off the camera or take out the Micro-SD card. This may prevent your camera from switching on and will need a factory reset.
b) A fast red flashing LED on the camera after the update means the update has failed. Please try again.
c) You need to use the latest DJI Vision App (iOS App: v1.0.32; Android App: v1.0.38).