Oldest Bosh domes works only if dome enclosure is covered with lower dome "glass". Try to find the switch
Really?! I never thought of that. Ill give it a try and see if it powers up. I don't think mine has a switch though since it has an internal diagnostics board with a built in tiny joystick for testing the camera. You can only get to it with the dome removed. But ill give it a try because it is an older Bosch dome.