There is a delay for starting a PS3 loco in conventional, so the headlight will not come on right away. But why it goes out after 4 seconds I don't know. I would not suspect bad wiring or a bad board just yet.

”MTH Prem 4-8-4 w/ PS3 won't start“

Can you be more specific? MTH Item number is always a good starting point. And, doesn’t start is different from headlight goes out. Please elaborate.

Thanks Mark for the quick response. Without the org. box or papers I can only guess the the correct # 20-3749-1  GS4  4-8-4  w/PS3 Here is more information I got it to run in DCS but a screeching or scratchy  sound is coming from the speaker. I thought the speaker went bad. removed the speaker and checked it, but to be safe put in another new speaker. I keep checking for a short on my transformer but no spikes One other thing when I press start up on my controller nothing happens but if I turn the gray  thumb wheel The lights come on engine moves forward but with scratchy noise also no smoke and transformer shows no short.

@JimmyT posted:

Thanks Mark for the quick response. Without the org. box or papers I can only guess the the correct # 20-3749-1  GS4  4-8-4  w/PS3 Here is more information I got it to run in DCS but a screeching or scratchy  sound is coming from the speaker. I thought the speaker went bad. removed the speaker and checked it, but to be safe put in another new speaker. I keep checking for a short on my transformer but no spikes One other thing when I press start up on my controller nothing happens but if I turn the gray  thumb wheel The lights come on engine moves forward but with scratchy noise also no smoke and transformer shows no short.

Jimmy - go to MTH Home page, click on product locator tab, and, on that page, drop down to cab number. Enter your cab# to confirm that that is indeed your engine. Next, try a feature reset, and if no change, follow it up with a factory reset.

I tried the cab # 4455   It comes up RK  4-8-4  SP w/PS3 steam engine However when I tried to load the sound file  It said not compatible.  I have version 6.1 on my Tiu & controller I also tried a factory reset in conventional no change. Thanks for the reponse