At the risk of beating a dead horse, I ran it this morning and the smoke unit works (it's always been a light smoker), it runs fine and both electrocouplers work. Just no horn, bell or chuffing sounds. It only makes a low hum, which I think is the smoke unit.
I would love to take it to a layout with DCS and someone who knows how to use the features of DCS, to see if there is some way to activate the sounds. Arnold