3 Apr
2017
3 Apr
'17
8:16 a.m.
I'm guessing it was a blob of foam, which has
deteriorated, but maybe it
was a metal spring, or a piece of u-shaped plastic etc.
May depend on the model, but mine has a spring under the plastic reset button in the top
of the case and one of those metal domed tactile switches on the PCB.
Richard Sheppard