Didn't your A1200 come with a crome video converter. I know mind did. It converts the Amiga video port to a VGA port, so you can use a VGA monitor. That is as long as you us the right video driver, included. That will only work with the 31.5KHz screenmodes. The 15KHz screenmodes will need a special multisync monitor or tv. The 15KHz screenmodes are needed to view the early startup menu and the basic screenmodes.