Hi guys, I 'm Back !
I left on the shelf for some time and last week I tried to fix my GP7 again !
The good news I found this problem oxidation in R4LC Board plug-in terminals I wiped them.
Now I don't have more the fail to run with legacy! But !!!
Bad news !
I don't know what I did because in railsounds power board the electrolytic capacitor burst and I not have more sounds!
I used the clean contact product all boards I really don't know what happened but I am going to repalce the board !
I searched in web site Lionelsupport.com I not found parts for my GP7#5101 - 6-28570 ( https://www.lionelsupport.com/...;submitButton=Search )
Now I don't to know if I buy only railsounds power boardor or twice or both railsounds 5.5 because I don't to know where was the problem!
What do you think?