I bought the computer end of last year as a back up for an older mac I had. When it came I checked to make sure it was functioning properly and everything seemed in order, so after set up I put it back in the box and stored it on the shelf until it was needed.Well fast forward 3 months and I go to start using the computer and the thing won't turn on using the charger that came with it or another mac charger that I know works as it chargers my son's computer. Of course it's now past the return window so I'm out of $600 for a computer I only used one time!