Train won't move. The sounds work great, and it used to move, but now it doesn't.

6 Things You Should Check When Your Model Train Won Run

What burning software/version are you using?

it sound like the feed dog & the presser foot need to be adjusted
so they work togeather,,it's very possible they need to be timed
a sewing machine repair shop can tell you for sure

check oil!, use hd oil it is great oil for v twins

Individual gears are not available, you Will need to replace the entire motor section.

You can purchase the part from Nelson directly.
http://www.lrnelson.com/replacement-parts/

Current price for the #77376 Plastic Motor Assembly is $21.57 + shipping.

(I just replaced the motor assy. on the one I use for my front yard - figured 15 years is enough. Works like new again).

the sounds are run off of a different battery source, check the battery under the seat and make sure that its connected

Make sure the remote wire is hooked up. You can run a small wire from the power terminal to the remote terminal. If it powers up, then you have a remote wire problem. You can run a remote wire from the blue power antennae wire of the deck.

Check the output of the transformer going INTO the controler. Mine is 19VAC. IF the controler is working you should measure 25VDC between the inner and outer track with the controller switched on. If you have the AC but not the DC voltage push the red reset button. Once you have the 25VDC put your train in place (engine and coal car) and it should run.

you could just have dead cell in the battery which isn't getting enough amps to the starter,, have the battery LOAD checked,, that will tell you if the battery is actually good, just because it registers 12 volts isn't necessarily an indication that the required amps are present.

Sounds like the receiver portion of your logic board has quit. The wall control is hardwired and doesn't use the receiver.