By the way, the controller is easy to remove from the case, just remove the two screws at the other end, then the screws on one side that hold it to the heatsink, it then slides out on the cable side, you just need to remove the end cap like you have done on the pcb end, the whole thing slides out as one unit then. This is a common problem on the Adaptto controllers, iv seen it many times on the Russian forum as well as here, its just a protective resistor, so there has been a short at some point. The only problem with sticking it on the end of a piece of wire like you have is its going to change the resistors value. The like for like replacement is a 3R9 or 3.9 ohms, sorry I cant remember the smt size, as I ended up buying all sizes and got the one that fitted, but I think its the 4mm size. There is apparently a range of values you can use, but I just replaced mine with a 3.9 in the end, as the 2.2ohm was making the controller do odd things sometimes.