I have found that the team at my LHS, can solve most the issues. That I bring to their store.
Bert & Ulmer, will try to fix things as I wait. They have a large stock of parts and boards.
I also like going to Brasseur Electric Trains, a LHS for myself and a OGR Magazine & Forum Sponsors.
It is import to have a great LHS, near your train room. I have two........
The best part of seeing Bert & Ulmer, there is a White Castle Restaurant, across the street. It is a long drive to both of my LHS, locations. 75 Miles to Brassuer and 40 miles to my other LHS.
They both have a fair business plan for their O Gauge, customers. I never mail back to Lionel or MTH, until my local LHS, tells me they can not resolve this issue.
Good Luck, with this issue.
Cheers from the Detroit & Mackinac Railway