Оригинальный сообщение: hectordtruong ,
I bet you have corrosion on the LCD connector. For some reason, water is always able to get in and under that and next thing you know, no backlight. Open up the phone again, and make sure the solder points are bright silver and not black. If it were the coil, it'd be like a burnt out bulb, no intermittent issues, just out. If you have corrosion, you're going to need to reflow the solder or touch up each individual pin with an iron.