I have purchased a Broadway Limited Paragon3 Sound DC DCC USRA Heavy Pacific Locomotive HO scale.

I purchased this a few years back forgot it I had in the cupboard, took it out to run it and program the decoder, unfortunately it keeps stalling intermittently, Has difficultly running at low to medium speeds range, If I give it a bit of juice (power), it will run continuously for awhile then stop again, sound comes back on but no movement. As I am in Australia the prospects of sending it back to Broadway limited in the USA, is not very viable, can any one that has had the same experience got any ideas, what my next action should be. Would appreciate some help. Thanks