Check to make sure the ribbon cable is not obstructing the camera module from moving. It doesn't take much resistance to effect the smooth motion of the camera. There is little room for the ribbon to stay clear of the cam. If not the ribbon, then you'll need to check the pitch motor. You'll need to take the drum off & inspect for sensor damage, (2 very tiny black sensors on motor base), OR, copper wire coating melt around the motor lugs. If the drone sat in the crashed position for a period of time before it was retrieved & was stuck in an unnatural position, it will overheat, causing the coating to melt