okay iI have no clue what to do iI have tried the most common ways to fix it and nothing has work it has 4 gb Idk what generation or anything iI bought it from my aunt but here is the problem when iI first got it it worked fine iI plugged it into my computer to put music on it and it screwed up ever since it has showed the apple screen then flashes black over and over until it dies i cannot turn it on at all my computer doesn't even register it when iI plug it up idon't know what to do and iI really want it to work please help someone?