I've never had trouble getting video out of a 6200, and I've owned 4 of 5 of them (you lose count at a certain amount...).
So I do wonder if there's something else going on with your machine, but I don't know what, especially if it all looks clean inside. I have had to use contact cleaner on DB15 ports before so that is always worth a try too.
But yeah, the offer of a microswitch DIP adapter still stands as one of those should definitely get it working with your Dell 19" monitor.