iPod mini click wheel not working

Tuesday i was listening to my ipod and it worked just fine. the click wheel was working and everything was okay. i put it on my ihome to charge that night and left it there until i got home from school the next day. it worked fine in the morning(wednesday) when my alarm went off. wednesday night i took it off my i home and my click did not work at all. the buttons work but i can't scroll thru my songs or change the volume. it still has it's original battery so i know that's not what could have damaged it. between the time that it did work and the time i discovered it didn't it was not dropped or exposed to any extremes. i have reset it several times and restored to the factory setting and nothing has worked. please help!! i have had it for almost 2 years so it's out of warranty. is there anything i can do to fix it myself? i don't have the money to service it.