I have 2 of these powerpacks both dated from Dec. 1977. They are both in mint condition. One of them when you turn on the power switch shows about 2 volts to the track. If I toggle off the feeder to that section were the engine is then toggle back on the voltage goes back to zero. If anyone has any experience in the workings or possible cause please contact me. I would appreciate any possible help. Thank You Vic D