If the firmware on one of your camera inputs fails, you can put one or all of them into recovery mode. For this to go smoothly, you'll need to disconnect any cameras attached to the Sphere.
Step 1: Switch on the SYS button and hold down the reset button (found between the Ethernet port and AC port) at the same time until the video and codec LEDs blink alternately (when one goes on, the other goes off)
Step 2: Choose the camera input you would like to put into recovery mode by selecting the corresponding IP addresses
- For Sphere, this is 192.168.1.1x, where x is the camera index (1-4)
- You only have to recover the inputs that failed, and then you can simply reboot the device to get all four camera inputs working again