For a cheap repair, simply walk to the bubblegum forest, talk to the unicorn belching rainbows, and he'll tell you how to go to the air ballon that will take you over mordor and the shire, until you land at the port of nude-amazonians, and the friendly chief will then take you below ground, past the three-breasted ogre cage, and into the goron caves. From there, you simply have to talk to the apple customer rep, located in the cave next to the blacksmith. ( if you see any elves with fairies following them, ignore them. They come through all the time) ask the goron named "lesly" for a screen repair, and mention my name. Only then, will he be willing to fix your ipod. After you hand over your ipod, go to the temple of light, pull the master sword from the pedestal, and travel seven years in the future. Find a huge wallet, Gather 200 rupee's, and pay lesly. (a huge discount, actually.) He should be almost done with the repair by then. You then will recieve the "Goron ipod....tm." However, the next time you drop it, it will break. (if the fairy-boy is there again swinging a large sword, tell him to hit the wall for a suprise.)
You can do a part replacement yourself. There are online retailers that have all the replacement parts, on eof the bigger places is http://portatronics.com.. Then for the repair if you can try to do it yourself or better ask a friend who has done a repair like this before.