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I purchased an American Flyer/Lionel 42573 Southern Pacific PA AA (power and dummy).
The dummy unit has a legacy receiver, smoke unit, and motor driver board (691-BEMC-C00).
My first thought was to make it a powered unit by adding 2 motors. However, testing with
a spare motor and also with the powered unit's motors did not work. Upon further investigation,
the powered unit has a chip with a sticker 42574.  The dummy sticker is 42575. Assuming this is
the problem, is it possible to get the board reprogrammed to support the motors?
Thanks.

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