Maybe if we just started taking our problem locos for a ride around the block in the car...

You should always give your electronics a good shake now and then!

Seriously, I suppose it could be  a board seating problem.   

You might try the re-programming to restore features. Details in the instruction book that came with the loco.

Above:

"You might try the re-programming to restore features. Details in the instruction book that came with the loco."

You can't "re-program" a Command locomotive unless the "Command" works - it did not, as stated, so no access was possible. It fired up only in Conventional/Analog mode.

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If it does it again - off with its head! Shell, that is - and wiggle/press everything in sight. I do suspect the 2000 mile or so trip back to New England "fixed" it. I was partly kidding/partly serious about replacing the Legacy with ERR - only as a last resort, of course.

It's a beautiful loco, but it's already been 8000 actual miles! And not counting the trip from the Mysterious East.

Perhaps you were missing a step at the original run. It could be like trying to find a 100 dollar mistake in a checkbook. Put it down, come back later and out of nowhere the mistake is found.

Rod Miller

Set the problem engine on your workbench and place a large hammer beside it. Place hammer where engine can clearly see it. Let both sit together overnight. Try engine again in the morning.  

Hello D500.........

If that was me , I would strip out all the Lionel electronics out of the engine (NOT the engine) put it in a blender on high setting and put it in the box and send it to lionel CEO, telling them the problem and let them EAT it !!!   I would also put in an DALLEE or Williams E-unit and put in the engine be done with it at least it will run and not give you future problems.  By the way I am having pot problems with my new 5 year old Z4000 which just acted up 2 days ago.  I think it is something I can well hope to fix at home but not going to spend 50 bucks to ship it back so they MTH can charge me a lot, wont do it.  If I cannot fix it then I will not buy another transformer from MTH but go back to buying MRC's they never gave me any problems as I bought a lot of their H.O. MRC transformers for long time so I trusted them. I have a posted thread here in this forums about this (Z4000 ).

Tiffany