Yep Buddy. George seems to have these MTH engines ALL figured out. From what I have read and heard he is a genius when it comes to troubleshooting and even can rebuild boards!!!!
I have a pretty perplexing problem myself right now, as I have a MTH Proto 2.0 Zephyr that will run on conventional power, but has no sounds at all,with the conventional power.
I just got my TIU and remote hooked up today,and when I put The Zephyr on the track the remote won't recongnize it.NO ENGINE TO ADD it keeps saying,the same problem you had.
It too,is a JUNK 5volt board, and nothing appears to be wrong with the board.No magic smoke smells, no traces of it frying.
I replaced the speaker with one that I know works, and was hoping that today with the remote and TIU,I could hit RESET ENGINE and maybe the sounds would come on. But I cannot even get it into the remote to try this last desperate step before I junk it.
GGG,I sure hope you see this post and are kind enough to offer some advice to me as well. I do not understand why it will RUN perfect in conventional mode(NO SOUNDS STILL),and now it won't even go into the remote for me to try this last desperate step!!!!!