Help my ipod

Hello,
my ipod will not turn on, one day i put it in sleep mode and didn't go back to it until 2 or 3 weeks later i tried to turn it back on but the screen was still black my parents are going to send it back to apple but i want to try and fix it myself. i have tried to plug it in and hold the home button and power button for 3 or 2 seconds but didn't work HELP ME PLZZ!!!!!!!!!