How to fix track reader on TnA engines?

Is the metal plate that makes contact with track spring loaded? If so, perhaps it’s as easy as replacing the spring (or perhaps gently tweaking the original spring)? Hopefully it’s not a wiring issue, because the tna trains are tangled with wires! Though if you’re good with a soldering iron, I suppose you wouldn’t be concerned. i am decidedly not good with a soldering iron .