I have a recently purchased PS3 engine that started doing this. It seemed like it was missing the watchdog signal. Sat there smoking with the volume louder than the normal DCS setting. Odd thing was it would respond to some remote commands such as directional change and horn without doing a startup command. This is a question for the DCS experts. Do you need to issue the startup command first in order to do a shutdown ? It would respond to the shutdown command. It wouldn't respond to throttle commands. I sometimes turn the layout on simply to move things out of the way to work on an area. The startup was getting to be annoying as this wasn't the engine I intended to move.
I decided to move it to a different spot on the layout that was fed by another channel of the TIU. Fired up the layout and it sat silent. Moved it back to where it was initially and it started up when powering up the layout. Decided to switch the output leads on the TIU so that area ran off the other channel. Engine now sat silent. Figured I maybe on to something. I switched the wires back expecting the engine startup when the layout was powered up. It has sat there silent for about a week now. Before it started up every time for a week. There may be a logical reason for this. But after a while you just shake your head to some of the things that go on.
