Hi Folks. Looking for advice on how to troubleshoot a Bachmann Silverton Durango H/O train.  Just got it back from Bachmann after they looked at it and told us nothing was wrong.  Worked great after we got it back from them for 15 minutes and then it stopped moving. We've checked track for connection problems, but our other engine works fine on it.  The Durango train's light will glow very dimly for a few seconds before it turns off completely. Otherwise, it will not run.  Thoughts?  Advice?