I need operating instructions for a used Lionel g gauge polar express train, model#711795

SOURCE: Lionel Polar Express Berkshire Locomotive will only go in reverse

No doubt the transistor in the motor controller inside the engine is shorted TIP31C Q6 If you have the skills you can repair the unit. Parts are cheap, like 50 cents. Expense is shipping. Have repaired at least one that had the probblem you describe
good luck

SOURCE: We have a Lionel 80-watt

This transformer is difficult to open unless you have the triangular security screw driver. Security bits can be purchased at any Harbor Freight tool store but you will need to adapt them to fit into the channels where the screws are recessed. Click on the link below to view the correct tool needed to correctly open this unit up:
http://www.amazon.com/Silverhill-Triangle-Screwdriver-Roomba-Happy/dp/B001F3FUBK/ref=sr_1_1?ie=UTF8&s=hi&qid=1277110784&sr=8-1-spell

SOURCE: The Cw 80 watt transformer

If you have a volt meter you can check the rails for power, Check the transformer wiring to the first rail connection and then along the rails for loss loose connection(s). If you have power to the rails it is an issue with the Engine, Check any brush or rail riders (connections) for a bent or broken tab. If for a temp fix in a broken connection tab or brush you can use Tin foil. Hope this helps.

SOURCE: New Lionel Polar Express train set-up issue. The

My son just got this train and we are having the same problem. Taking the last car off solved the problem for us. I think it has something to do with accessories and the transformer voltage output (See page 14 and 15 of the instructions).

I have still not determined why it won't run with the final car but am assuming it has something to do with the lights on the cars pulling too many amps and not enough left to run the train. I will let you know if I find a solution. If anyone else knows how to solve the issue, any assistance would be greatly appreciated.

Thanks

SOURCE: I'am looking to sell my Polar express lionel

Please go to the Lionel WebSite and type:

73-1960-250 in to search. This is a PDF file for the Polar Express which was released by Lionel in 5/05. You can also go directly to: http://www.lionel.com/media/servicedocuments/73-1960-250.pdf