The first thing you should do is check if the hold switch is on, and if that is the case, you’ll notice an orange patch. To turn the switch off, all you need to do is slide, and when an orange patch is no longer visible, it’s done. In order to turn on your iPod touch, press any button.
If the iPod’s battery is not charged, you won’t be able to turn on your device. Connect it to your computer via USB cable, or use the power adapter.
Sometimes, you need to let the battery drain completely, and to do that, disconnect your device from all power sources, and leave it that way for a day.
Hold power and home buttons until the apple logo shows up. Reboot often clears all the glitches.
Connect your iPod to your computer via USB cable, and if there is a new version of software available for your iPod, iTunes will show it.