Greetings,

I need some advice on how to repair some damage on my HO Proto Heritage Berkshire.
My 5 year old son lined a switch half-way causing the Berk to go down one track while the tender tried to go down another. 
There was a big short and after examining everything here is what I have found out:  the Tsunami decoder is ok.  The lighting is ok.
My problem is this: the circuit board that the engine tether plugs into one one side and the decoder is hard wired to on the other side is melted in the tender.
The engine will still run with all sounds but it gives the error message with the blinking headlight. (This is how tsunami decoders let you know there is a problem.) The 11 blinks show that there is a problem with the motor contact.
After folling the wire leads and the onto the circuit board I have discovered the red wire has melted on the board and there is a break of current.
I called walthers and asked to order another board but they wont sell me one.  Since I bought this used they will charge an unholy amount to fix it.

Would some one tell me what the i/o port in the back of my ez commander is for.  I have no idea.   Thanks