I have problem with the sound effects of the locomotive 4:6:0 "summit pass". Months before i was told to test the tender without the locomotive, and the result was that it works fine, but that means that the locomotive is failing, also it start moving at 35% and at 60% to 100% it doesn't increase speed. When i first test it it ran well but now it slow down and sometimes it makes quick stops and start over running again.
What can i do to fix it or it must be done through a bachman warranty. If that is the case i bought it on ebay on August this year, it was brand new but, i am  from Chile. What must i send with the locomotive to use the warranty?.

I bought recently a train for the birthday of my wife, but when i tested it didn't sound. It move and also the light turns on, but no sound. I checked the wires and probed different position but no results. Changed the battery but nothing happend... Can anybody help me? how can i fix the problem?... I am from Chile so the biggest problem is i can't send it to USA for the warranty, because it is very expensive.