I left my Palm Pilot on the dashboard of my car one day, and the LCD melted. Fortunately, I had seen this before in undergraduate physics lab, the day our LCD

I left my Palm Pilot on the dashboard of my car one day, and the LCD melted. Fortunately, I had seen this before in undergraduate physics lab, the day our LCD experiment was interrupted by the room thermostat breaking, sending the temp > 100F. The nice thing about LCDs is that the crystals reform when it cools. All you have to do is wait. Probably works for most modern phone displays.