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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
I'm afraid not - there's actually very little that happens at boot. During hardware initialisation it turns the red LED on (which is why you see that blink at startup) but if that's gone out you're almost certainly in JS-land.
Are you having some trouble with it starting up?