The GPS system in iPads and iPhones relies upon the cellular connection. It uses the towers to pinpoint the location. If you get a non-cellular model of the iPad Air, then you can only get location from wifi.
Try sticking only one good RAM stick in each RAM slot and try to reboot it. If that doesn't work, try booting it without any RAM in it and it should let out a long beep. If it lets out a long beep without the RAM, then your logic board is still good. If not, your logic board will need to be replaced.
First, turn off the iPod. Then, connect it to a Mac or PC with iTunes installed on it. Turn the iPod on, but hold down the Home button for ten seconds, and iTunes should say "An iPod in recovery mode has been detected" and it should restore the iPod.