have you checked the battery voltage? it should be above 3.7v some times you have to recharge it using a 12v or 9v DC adapter to bring it back to life, do this only for about 20-30 seconds the battery should hold charge above 3.7. be sure to do this when battery is NOT attached to the mainboard. if the battery holds its voltage and the ipod is still not turning on, and pc does not show a thing when you plug it in, double check your assembly, lcd, battery welding, front pannel.