Electronics like this have their power regulated by a soft switch that depends on electronics to turn on and off the juice. (In other words, a mechanical switch is not used.) These sometimes go bad in that they "leak" and don't turn off completely. Your battery then takes a hit. . The solution is to have it sent off. The repair center probably does nothing more than replaces the entire circuit board.
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Electronics like this have their power regulated by a soft switch that depends on electronics to turn on and off the juice. (In other words, a mechanical switch is not used.) These sometimes go bad in that they "leak" and don't turn off completely. Your battery then takes a hit. . The solution is to have it sent off. The repair center probably does nothing more than replaces the entire circuit board.