Quoted from davegauth:SOLVED....
Just wanted to leave this with an update for future searches.
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Also - for anyone following, apparently you can't just move a board to another area on the data link chain. It will not function properly as the position in the chain determines the data it receives. Something like that anyway.... ...
The SW1 DIP switches on the NODE board set its location in the pinball network. So simply switch the DIPs on/off to match the board you are replacing.
John :-#)#