something i noticed before it stopped working was that the machine would turn on when i plugged it in, without pushing the button, indicating it may have been stuck in the on mode and having difficulty turning off.
i could in theory use anything for the external button. it's just a piece of plastic; i could even rip it out and just turn it on with a screwdriver or a knife. however, if the internal button is broken, it needs to be replaced.
let me let it sit for a few hours, and i'll make the decision a little past sunrise. i will take the walmart bike out for a spin this afternoon to get a coffee machine of some sort, one way or another.