Apologies if this is the wrong forum for this question. Fitted the sound decoder into the new Tiger and am having issues with it now shorting the DCC track. Track is wired up with droppers on all sections, no dead spots, correctly isolated and all other trains run perfectly. Using NCE PowerCab as DCC controller. Train power ups for a sec then dies, red light on controller plate goes off, remove train light comes back on. What is most logical place to start ? Thank you