The other day I was running my bachmann Spectrum K4 with sound. I lost control of the locomoitve and couldn't stop it. I turned off the power to the layout and tried to start the locomoitve up again. The locomoitve at first would move but the sound wouldn't respond to any function. Later I tried to use it again and the sound would work but the locomoitve would not move. I took the shell off the tender and put another decoder in the locomoitve and it ran fine. I really dont want to send the locomoitve back to bachmann because I've made changes to it. Thanks for any help or comments you have.
Yeah its the factory installed decoder Tsunami.