I took a close look at the LCRU board and is has melted components and a burnt circuit board. It was hard to see without a really bright light and magnifying glass. The circuit board is burnt in two different places. One is by Q4 and the other is by a diode. Could not read the number, it was burnt off.
Whoever said this is a LCRU version 1 board is correct. The Commodore Vanderbilt has the LCRU 2 board. The board is still available from Lionel.