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I have a Lionel UP SD40T-2 locomotive 6-28540 that will only run using a transformer. When I put the locomotive on the track to try to run it in command control all the lights come on, but I can't do anything else. I've removed the shell and reseated the boards, and I've checked for wires that are broken or pinched but it still will not run-in command control. I've tried replacing the R2LC board with no luck because I can't get the locomotive to even accept a change in the ID# or a factory reset that is shown in the owner's manual. I would appreciate anyone's help with this problem. Thanks Gary

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Hi gunrunnerjohn and steims  Thanks for your idea's. This locomotive belongs to friend of mine, but I also own the same 6-28540 4004 so I think I'll take the R2LC board from my 4004 and put it in this one and see if that fix's my troubles. I also have a bunch of switches, so I think I'll just replace the run/pgm switch also to see if that's my trouble with this loco. Gary

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