I upgraded two steam engines from Proto 1 to Proto 2 (this was two years ago) I had a local reputable train guy do the work.
One was a MTH railking C&O Allegheny the other a MTH railking Big boy.
The engines started fine and the sound fired up, smoked worked, moved fine. after several days of operating the sound stopped. everything else still works.
so since that happened I removed them from the tracks. sat on the shelf for 5 months, put back on track, sound worked for about 5 minutes than stopped again.
both engines are doing the same thing (they were both upgraded at the same time). I contacted the installer, he said bring them back and I'll check them out. He did, He found nothing wrong with his work and couldn't explain what happened. (nothing he could do, except charge to install another). So I have them back. I went to Mr. Muffins Trains, Steve placed on his track and used his DCS controller to do a factor reset, didn't work.
I am frustrated. PS, I did have Ozzie trains check them out too. He removed the cover and checked every wire. all connected, (he didn't charge me either).
Is there anything that is now not working? I don't know what board it needs. so weird since both do the same thing and sometimes they work.