IPod Light Problems

I have a broken screen IPod Touch 4th Generation. Okay, so i was charging my IPod Touch. A few minutes later, i got on my IPod. the screen was so dark i could barely see. I was than pressing on the screen where the front camera was at, and suddenly the brightness started to change around. It than shut down on me. i couldn't turn it back on since than. I tried connecting to Itunes but it don't seem to work. Oh yea, the top part of the ipod is a bit broken (glass came off). is there something i can do to my IPod to fix it? Perhaps opening it or anything. I'm not sure if its the brightness or it's plain old broken. i had it for 2 years. 4th Gen IPod Touch. Reply back asap! Thank You.