Friend gave me old broken Nintendo Lite (it wasn't swich on )and said that repair a very easy: i just have to change battery. I did it, then i charged it for couple hours. At those moment everything was fine but then when i turned on Nintendo's green light swiched on, then sound like "click" upper screen blinked for a second then Nintendo swiched off. I tried everything and change battery and recharge again, but still the same. Upper screen blinks, bottom screen doesn't show anything, then swich OFF. What's wrong with Nintendo? How difficulty to repair it? what do we have to do? My friend promes to help me.