@John H posted:I seem to have a blown TIU.
If you are not using all the channels, have you tried another? Do you have no power or a dead short? You haven't exactly described what the problem is. Is it just one channel? We could use some more info.
I have only used the fixed # 1 channel. I couldn't communicate with my MTH DCS Loc. Thought sure it was a blown engine board. Then took another MTH engine and put it on the track to confirm a bad engine and to my surprise it didn't work either. Since the other engine was brand new I knew I had to look elsewhere.
Fortunately I had another TIU put away so I tried it and bingo the original engine popped right up and went to work.
Hope that gives a little more detail.
Thanks again to those who have responded.
Dean