Like I said, the fans are probably wired different from each other, hence why one is dead on the Talismoon set, and the other is dead on the stock set. Go by how the stock fans are acting and replace that Transistor and you should be alright
The Transistor is either a ZT751 or a BCP51, either one will work as a replacement and it needs to be one of those. There are a slew of others that would also work, but I'm not gonna get into that mess. The Transistor is Surface Mount and there are a lot of other really small SMT parts around them as well, so if you don't know what you're doing, have someone that does do it for you, the last thing you want to do is go lifting traces and removing parts 'accidentally' that don't need to be removed and making a bigger mess than it's already in.