Hi,
Newbie here...
Bought my 6 yr old the Bachman HO fire chief starter set this past Christmas.
We set it up and played with it over the Christmas Hoilday, and then set it aside until just last week.
I went to set it up again, and the train will not run.
The controller/transformer is a plastic grey unit that has a red power cord going to the track via "unique" plug on end (that goes into track.  The controller does not "hum" but the red power light does indeed come on.
I took the locomotive to the hobby store (where purchased) and they confirmed  the engine does work..
Is the controller an item that i can repair (or at least "trouble shoot")? 
Thoughts or help would be appreciated! 

Thanks,