Good afternoon, You see, I have a coca cola neon that has recently melted a part of it: The fact is that it is new, and I imagine it is not for the tube but for the transformer. I have disassembled the transformer and wanted to try my luck to change it, the fact is that my knowledge of electronics is nil. I leave here some photos, since it has two transformers, one for the "Coca and the bottle" part and another for the "Cola" part: https://photos.app.goo.gl/p8ivcKbSOxbkCcXq2 What transformer should I acquire? Would you have to change both or just one?

You already mentioned to exchange the one that works to know if the neon tube part is ok. Apart if it is the converter (electronic traffic), you can only change the one that does not work, they are independent circuits.