I bought a Q2 (ps2 5v) with a bad board! So my plan was to remove a board from a less desirable railking engine. The donor engine has seen a lot of run time on my layout,with no issues! So I swapped the boards and tried to start it,and its DEAD! So I'm bummed and decided to try it one time! So I grabbed another donor and removed the board. The second board works as it should! So any ideas as to why the first board died? Is there any type of procedure, electrically speaking? Thanks for your help!!
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