When I turn my imac on or it comes back from being set to sleep, the back of my mac crackles and pops. Is there anything I can do? It's not even a year old and I don't want to send it away because I need it.
Well, it’s not going to get better :) Especially because you’re within your first year, get it looked at now as it’ll be covered by your warranty.
Also, buy AppleCare while you’re within the first year.