A few members have had repairs carried out by me over the past few months so I thought it'd be better to post in here. I repair and /or sell Columbus units (and the VW version RNS510) in my spare time. Possible repairs start at security code retrieval, through software re-installs and upgrades, to component replacement such as hard drives, radio boards, dvd drives, replacement touchscreens, etc. and complete replacement units if beyond repair.   So if your Columbus has a fault, screen