As the title says... I have a 900s that I purchased a bit over a month ago. I just got around installing it yesterday, everything worked great during testing and installation. Once installation was completed and I verified both cameras were working and recording, I updated the firmware from the original, shipped firmware to the latest version. Upon completion, the rear camera no longer works. Anyone know if it's possible to acquire older firmware so I can try to revert and see if it's a firmware issue or a hardware issue? It was literally working moments before the firmware was updated.