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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 think it's likely the display will work and be visible in the area that's dark, but probably the rest won't be visible.
It might be worth leaving it for a bit just in case it recovers a little over time, but I don't hold out much hope.
I'm afraid the LCDs are just really sensitive to temperature. You need to be super careful not to get them anywhere above 100 (I've broken one or two myself, exact the same as yours).