Hi, Benihana the Team White Goat engineer here. Wanted to create a post that would piece together some things I’ve found repairing FPV cameras. Hopefully it will help someone fix theirs.
Majority of the time a camera fails due to mechanical damage. One hard crash parts explode off the board. The largest and heaviest parts will break away first. CCD sensors are usually the first to break away. Most of the time a quick touch up of solder on all the CCD pads will bring a camera back to life. If its really bad, the CCD sensor will pull the pads off the board. This usually require major surgery under a microscope involving thin wire and a steady hand. Always a good idea with any new camera to epoxy the CCD to the PCB to prevent this.
Other thing that likes to fly off is large capacitors (Brownish white things) , inductors (large circular or square black things), and crystals (silver cylinder things). All of these parts are critical to the camera running. Most of the time the larger capacitors are around 10-20uf and regulate the DC coming into the camera.
Next array of issues are electrical. Most of the time will happen to cameras not in protective cases that are loose and short out against the conductive carbon fiber frame. Most cameras will have a reverse protection diode that acts like a fuse if there is a fault. They are located really close to where the power enters the board.
Recently I repaired a Runcam PZ0420M. This board has a 3.3v regulator and an 18v boost converter for the CCD. The board shorted to the carbon frame and caused the DC boost converters to fail. The boost converter (SX1308) was shorted to ground and needed to be replaced. The flyback diode and protection diode was replaced too. Below is a picture of the parts replaced.