So what were they locked to ? Did they just stop working if the 12V was ever removed or something ? All my instruments have switched supplies so that would be a pain if so...
Not sure that you can guard against helping thieves with that sort of service. Few people will have an original receipt. A legitimate company whose receipt you might trust wouldn't be selling a locked instrument second hand. The common legitimate case would probably be that an owner has died. The best you could probably do would be to try and get to know your clients but the time you'd need to invest in that wouldn't make it a good business propsition. I was lent one by someone who knew that I'd bought my boat (and codelocked instruments) from the estate of a deceased previous owner because he'd been the broker. I keep meaning to ask to borrow it again now that I've got the facilities for seatalk protocol snooping, but then I'd have another moral dilemma: once we know how it works and can replicate it in software, should we publish it...
Welcome to the forum. Unfortunately, Nigel Mercer who started this thread died in late 2016 so will not be able to help you. However, someone else may be able to. I’d suggest that you start a new thread asking directly for help in unlocking Raymarine ST50 instruments as that’ll generate more interest than reviving an old thread.
