Initially all buttons failed. After checking troubleshooting videos on youtube the problem was the pins vs, holes alignment in the press tool. Ideally the aligment should be automatically set when sliding right and left, but due to poor precision it rarely works. Thus, at fIrst press make sure the pins DON'T go through the holes (by twisting/rotating the tool by hand), the \"cup\" must be pressed all the way down until the springs are flattended. On the second press the pins should go through the holes (the cup will go all the way down again until the springs are flattened) Please note that due to the button being rotated between press 1 and 2 the picture and the pin on the back will not be aligned, thus this amount of rotation needs to be considered before the first press.
Steph 
