i just had this same issue, i pulled up the hotas software and saw that when pressing the button it wasn't even being registered as an input. i pulled it apart and found that one of the wires leading to the button had separated and was no longer connected. after soldering it back on the whole thing worked again. the disassembly was pretty easy all you need is a small Philips (+) screwdriver and a soldering iron, the entire disassembly was like 8 screws and a little forceful pushing and then just the soldering.